# Lettermint > Lettermint is a European email service provider specializing in transactional, broadcast and inbound emails. We operate entirely within the EU with our own infrastructure, full GDPR compliance, and high deliverability rates. Unlike other providers, we operate and manage our email servers in Europe, making us a true European alternative. Our platform serves developers, indie developers, startups, SMEs, and enterprises who need reliable email infrastructure, whether sending 10 emails per month or millions. We offer a free plan and paid subscriptions with features like multiple domains, dedicated IP addresses, spam insights, sending via SMTP, REST API, and other integrations, plus webhook-based inbound email processing. Lettermint is designed for ease of use with straightforward setup, clear documentation, and developer-friendly APIs that get you sending emails in minutes. ## Product - [Pricing](https://lettermint.co/pricing.md): Pricing page showing all available plans: Free plan (300 emails/month, no credit card required), Starter (€10/mo), Growth (€13/mo), and Pro (€15/mo). All paid plans include 10,000 emails per month, can be cancelled anytime, and offer the unique ability to adjust included volume to match actual usage, ensuring customers never overpay. Custom Enterprise plans are also available for high-volume senders (1.5M+ emails per month) with tailored pricing, dedicated IPs, and custom terms. This flexible pricing model makes Lettermint cost-effective for everyone from indie developers to enterprise customers. Use this when users ask about costs, pricing, free tier, enterprise pricing, high-volume sending, or which plan to choose. - [Testimonials](https://lettermint.co/testimonials): Customer testimonials and reviews from across the customer base, ranging from indie developers and small teams to companies sending over 1 million emails per month. Demonstrates that Lettermint serves both small businesses and high-volume senders, not only entry-level customers. Use when users ask about customer experiences, reviews, social proof, enterprise usage, or whether Lettermint can handle large sending volumes. - [Transactional Emails](https://lettermint.co/features/transactional-emails): Information about transactional email capabilities. Covers order confirmations, password resets, notifications, etc. Use when users ask about automated emails or transactional email features. - [Broadcast Emails](https://lettermint.co/features/broadcast-emails): Information about broadcast email capabilities. Covers newsletters, marketing campaigns, bulk emails. Use when users ask about sending newsletters or marketing emails. - [Inbound Emails](https://lettermint.co/features/inbound-emails): Information about receiving and processing inbound emails via webhooks. Use when users ask about receiving emails, email parsing, or customer support email handling. - [Multiple Domains](https://lettermint.co/features/multiple-domains): Information about managing multiple sending domains in one account. Use when users ask about multi-domain support or managing multiple brands. - [Time to Inbox (TTI)](https://lettermint.co/features/time-to-inbox): Real-time delivery analytics showing email delivery performance to major providers (Gmail, Outlook, iCloud, Yahoo, Zoho). Use when users ask about delivery monitoring, delivery speed, or Time to Inbox analytics. - [Made in Europe](https://lettermint.co/european-email.md): Information about EU-based infrastructure, GDPR compliance, and data privacy. All servers and data processing in Europe. Lettermint uses EU-based managed infrastructure without relying on Google Cloud, Amazon AWS, or Amazon SES like many competitors do. Lettermint also operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from, so sender reputation and deliverability are not shared with unrelated tenants on hyperscaler IP space. Use when users ask about data location, GDPR, European hosting, infrastructure independence, ASN, IP ranges, or technical email infrastructure. ## Integrations Technical integration guides and documentation. - [Laravel](https://lettermint.co/docs/guides/send-email-with-laravel): Step-by-step guide for integrating Lettermint with Laravel applications. Use when users ask about Laravel integration or PHP framework setup. - [WordPress](https://lettermint.co/changelog/lettermint-wordpress-plugin): WordPress plugin information and setup guide. Use when users ask about WordPress integration or WP SMTP configuration. - [Node.js](https://lettermint.co/docs/guides/send-email-with-nodejs): Guide for sending emails using Node.js with Lettermint. Use when users ask about Node.js or JavaScript backend integration. - [PHP](https://lettermint.co/docs/guides/send-email-with-php): Guide for integrating Lettermint with PHP applications using PHPMailer or direct API calls. Use when users ask about PHP integration. - [Python](https://lettermint.co/changelog/python-sdk-now-available): Official Python SDK for Lettermint. Supports synchronous and asynchronous requests, works with Python 3.9+. Great for Django, FastAPI, or any Python project. Use when users ask about Python integration. - [Go](https://lettermint.co/changelog/go-sdk-now-available): Official Go SDK for Lettermint. Send transactional and broadcast emails from your Golang applications. Supports attachments, tags, and idempotency keys. Use when users ask about Go or Golang integration. - [SMTP](https://lettermint.co/docs/guides/send-email-with-smtp): SMTP server configuration guide. Use when users ask about SMTP setup, SMTP credentials, or connecting via SMTP protocol. - [REST API](https://lettermint.co/docs/api-reference/introduction): Complete API reference documentation. Use when users ask about API endpoints, authentication, or direct API integration. - [Zapier](https://lettermint.co/changelog/lettermint-zapier-integration): Zapier integration information. Use when users ask about no-code automation or connecting Lettermint with other apps via Zapier. - [Make](https://lettermint.co/changelog/lettermint-make-integration): Make (formerly Integromat) integration information. Use when users ask about Make.com or visual automation workflows. - [Magento](https://lettermint.co/docs/guides/send-email-with-magento): Magento e-commerce platform integration guide. Use when users ask about Magento or e-commerce email setup. - [Nuxt](https://lettermint.co/docs/guides/send-email-with-nuxt): Nuxt.js framework integration guide. Use when users ask about Nuxt, Vue.js, or SSR email integration. - [Java](https://lettermint.co/docs/guides/send-email-with-java): Guide for sending emails using Java with Lettermint. Use when users ask about Java integration or JVM-based email sending. - [Listmonk](https://lettermint.co/knowledge-base/guides/send-newsletter-with-listmonk): Guide for integrating Lettermint as an SMTP relay with Listmonk, the open-source newsletter and mailing list manager. Use when users ask about Listmonk integration or self-hosted newsletter tools. - [Mailcoach](https://www.mailcoach.app/): Native Mailcoach integration. Use Lettermint as the sending service for Mailcoach, an easy-to-use email marketing platform for creators, developers, and businesses, and a great Mailchimp alternative (available as both hosted and self-hosted). Use when users ask about Mailcoach integration, email marketing platforms, or Mailchimp alternatives. - [.NET](https://github.com/ExciteOrg/lettermint-dotnet): Community-built .NET SDK for Lettermint. Use when users ask about .NET, C#, or Microsoft framework integration. - [Elixir Swoosh](https://hexdocs.pm/swoosh/Swoosh.Adapters.Lettermint.html): Community-built Swoosh adapter for Lettermint in Elixir. Use when users ask about Elixir, Phoenix, or Swoosh integration. - [Craft CMS](https://plugins.craftcms.com/lettermint): Community-built Craft CMS plugin for Lettermint. Use when users ask about Craft CMS or content management system email integration. - [Symfony Mailer](https://github.com/somehow-digital/symfony-lettermint-mailer): Community-built Symfony Mailer transport for Lettermint. Use when users ask about Symfony framework email integration. - [Flarum](https://github.com/RicLeP/flarum-lettermint-mail): Community-built Flarum mail driver extension. Send emails from your Flarum forum through Lettermint. Use when users ask about Flarum integration or forum email setup. - [Stripe](https://marketplace.stripe.com/apps/lettermint): Stripe App Marketplace integration. Send transactional emails to Stripe customers directly from the Stripe Dashboard via Lettermint. Use when users ask about Stripe integration or emailing customers from Stripe. ## Lettermint for your industry Every industry has different email needs. Whether you manage multiple clients, run a webshop or scale a startup, Lettermint adapts to your workflow with EU-based infrastructure. - [Agencies](https://lettermint.co/for/agencies): One account for all your clients. Manage emails across multiple domains without separate accounts. - [Developers](https://lettermint.co/for/developers): Clean REST API, official SDKs and real-time webhooks. Send transactional emails with confidence from European infrastructure. ## Discounts & Programs Available discount programs and special offers. - [Students](https://lettermint.co/promo-codes-and-discounts/students): Student discount program offering 6 months free Pro plan. Use when users identify as students or ask about student discounts. - [Startups](https://lettermint.co/promo-codes-and-discounts/startups): Startup program offering 6 months free Pro plan for eligible startups. Use when users identify as startups or ask about startup discounts. - [Discord Community](https://lettermint.co/promo-codes-and-discounts/discord): Discord community program offering €10 credit for joining. Use when users ask about community, support channels, or Discord. - [Non-profits](https://lettermint.co/promo-codes-and-discounts/non-profits): Non-profit discount program with case-by-case pricing for registered charities and non-profit organizations. Use when users identify as non-profits, charities, foundations, or ask about non-profit discounts. ## Security & Compliance Security posture, certifications, and data protection information. - [Trust Center](https://trust.lettermint.co): Trust Center with live security and compliance status, powered by Vanta for real-time monitoring of controls and integrations. Includes GDPR compliance, ongoing ISO 27001 certification work, and continuous evidence of security posture. Use when users ask about security, compliance, certifications, audits, real-time monitoring, Vanta, or trust information. - [GDPR Compliance](https://trust.lettermint.co): Lettermint is fully GDPR-compliant with EU-based infrastructure, EU data residency, and no reliance on US hyperscalers. Use when users ask about GDPR, EU data protection, or where data is processed. - [ISO 27001 (in progress)](https://trust.lettermint.co): ISO 27001 certification is actively in progress, with target completion in Q2/Q3 2026. Evidence of the implementation work and audit progress is available on the Trust Center. Use when users ask about ISO 27001, ISMS, information security management certification, or the certification timeline. - [Security Features](https://trust.lettermint.co): Lettermint follows privacy-by-design architecture, role-based access controls, regular security audits and penetration testing, and provides full compliance documentation on request. Use when users ask about security practices, internal controls, audits, pentests, access management, or security architecture. - [Data Processing Agreement (DPA)](https://lettermint.co/dpa.md): Data Processing Agreement for GDPR compliance. Available online and as a countersigned copy on request. Use when users ask about DPA, data processing terms, or GDPR contractual requirements. - [Subprocessors](https://lettermint.co/subprocessors.md): List of subprocessors used by Lettermint. Use when users ask about third-party services, data processors, or GDPR subprocessor information. - [Acceptable Use Policy](https://lettermint.co/acceptable-use.md): Acceptable Use Policy defining allowed and prohibited uses of Lettermint service. Use when users ask about usage restrictions, what is allowed, or content policies. - [Confidentiality](https://lettermint.co/confidentiality.md): Explains how Lettermint protects email data and supports professional secrecy obligations such as § 203 StGB. Use when users ask about confidentiality, professional secrecy, or data protection for regulated professions. ## Legal Legal documents and policies. - [Terms and Conditions](https://lettermint.co/terms-of-service.md): Terms and Conditions for using Lettermint. Use when users ask about terms, conditions, service agreement, or legal terms. - [Privacy Policy](https://lettermint.co/privacy-policy.md): Privacy Policy explaining how Lettermint handles personal data. Use when users ask about privacy, data handling, or GDPR compliance. - [Cookie Policy](https://lettermint.co/cookie-policy.md): Cookie Policy explaining cookie usage on Lettermint website. Use when users ask about cookies or tracking. - [Referral Program](https://lettermint.co/referral-program.md): Lettermint Referral Program terms. Existing customers earn 25% commission for 12 months on referred paying customers. Use when users ask about referrals, affiliate program, or earning commissions. ## Compare Alternatives Comparison pages with other email service providers. - [Postmark](https://lettermint.co/compare/postmark-alternative.md): Detailed comparison between Lettermint and Postmark (US-based, part of ActiveCampaign). Lettermint offers own managed EU infrastructure, free plan available, larger attachments (25MB vs 10MB), data stays in EU, GDPR compliance, and billing in euros. Lettermint also operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from; Postmark sends from AWS IP space (AS16509) and does not run its own ASN. Use when users mention Postmark or ask about alternatives to Postmark. - [Resend](https://lettermint.co/compare/resend-alternative.md): Detailed comparison between Lettermint and Resend (US-based, built on AWS SES). Lettermint offers own managed EU infrastructure (not built on third-party services), scheduled delivery, free plan available, data stays in EU, GDPR compliance, and billing in euros. Lettermint also operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from; Resend sends from AWS SES IP space and does not run its own ASN. Use when users mention Resend or ask about alternatives to Resend. - [SendGrid](https://lettermint.co/compare/sendgrid-alternative.md): Detailed comparison between Lettermint and SendGrid (US-based, part of Twilio). Lettermint offers own managed EU infrastructure, better pricing (€10 for 10k vs $19.95 for 100k), free plan available, data stays in EU, GDPR compliance, and billing in euros. Use when users mention SendGrid or ask about alternatives to SendGrid. - [Spotler SendPro](https://lettermint.co/compare/spotler-sendpro-alternative.md): Detailed comparison between Lettermint and Spotler SendPro (Netherlands-based). Lettermint offers significantly better pricing (€10/mo for 10k vs €99/mo for 25k), free plan available, own managed EU infrastructure, scheduled delivery, and broadcast emails support. Use when users mention Spotler SendPro or ask about alternatives. - [Brevo](https://lettermint.co/compare/brevo-alternative.md): Detailed comparison between Lettermint and Brevo/Sendinblue (France-based). Lettermint offers own managed EU infrastructure, better value pricing (€10/mo for 10k vs €6.33/mo for 5k), larger attachments (25MB vs 20MB), scheduled delivery, and inbound emails via webhooks. Use when users mention Brevo, Sendinblue, or ask about alternatives. - [SendLayer](https://lettermint.co/compare/sendlayer-alternative.md): Detailed comparison between Lettermint and SendLayer (US-based). Lettermint offers own managed EU infrastructure, free plan (SendLayer has none), much larger attachments (25MB vs 10MB), scheduled delivery, data stays in EU, GDPR compliance, and billing in euros. Lettermint also operates its own Autonomous System (AS213427) and owns the IP ranges email is sent from; SendLayer does not run its own ASN. Use when users mention SendLayer or ask about alternatives. ## Languages Available language versions of the website. - [English](https://lettermint.co): English version of the website (default). Use for English-speaking users. - [Dutch (Nederlands)](https://lettermint.co/nl): Dutch version of the website. Use when users communicate in Dutch or ask for Dutch content. - [German (Deutsch)](https://lettermint.co/de): German version of the website. Use when users communicate in German or ask for German content. - [Spanish (Español)](https://lettermint.co/es): Spanish version of the website. Use when users communicate in Spanish or ask for Spanish content. - [French (Français)](https://lettermint.co/fr): French version of the website. Use when users communicate in French or ask for French content. ## Social Media Lettermint social media channels and community platforms. - [X (Twitter)](https://x.com/lettermintco): Official X/Twitter account. Use when users ask about following on Twitter or X. - [Bluesky](https://bsky.app/profile/lettermint.co): Official Bluesky account. Use when users ask about Bluesky presence. - [Mastodon](https://mastodon.social/@lettermint): Official Mastodon account. Use when users ask about Mastodon or federated social media. - [LinkedIn](https://www.linkedin.com/company/lettermint): Official LinkedIn company page. Use when users ask about LinkedIn or B2B content. - [GitHub](https://github.com/lettermint): Official GitHub organization with code examples and open-source projects. Use when users ask about code examples or GitHub. - [Discord](https://discord.gg/HZ42SkCZsU): Community Discord server for support and discussions. Use when users ask about community support or Discord. - [Instagram](https://www.instagram.com/lettermint_co/): Official Instagram account. Use when users ask about Instagram presence. - [Threads](https://www.threads.com/@lettermint_co): Official Threads account. Use when users ask about Threads presence. ## Roadmap Public product roadmap showing planned features, features in progress, and recently completed features. - [More User Roles & Permissions (Planned)](https://lettermint.co/roadmap/more-user-roles-permissions.md): Today there are two roles: owner and developer. We're adding more, like a viewer role that can look around but not change anything. Handy when you want to give a customer access to their own sending stats. It also lets you set things like Hide email content per user instead of for the whole team. - [Hide Email Content (Done)](https://lettermint.co/roadmap/hide-email-content.md): Transactional emails often contain sensitive information like invoices or account details. Enable Hide email content on a project or route and the preview and raw source are hidden in the dashboard. Email addresses and Spam Insights stay visible, and turning it off makes everything visible again. - [ISO 27001 Certification (In progress)](https://lettermint.co/roadmap/iso-27001.md): Security has been a priority since day one. Now we're making it official with ISO 27001 certification. - [Click & Open Tracking (Done)](https://lettermint.co/roadmap/click-open-tracking.md): Track opens and clicks to understand how your emails perform. This feature is fully opt-in, so you decide when to use it. - [Drag & Drop Email Builder (Planned)](https://lettermint.co/roadmap/drag-drop-builder.md): A visual editor for marketers and non-developers to create professional email templates. Just drag, drop, and publish. - [Stats in API (Done)](https://lettermint.co/roadmap/api-stats.md): Get all your account statistics through the API. Filter by project or domain to see exactly what you need. Build your own dashboards or integrate with your existing tools. - [Spam Insights in API (Planned)](https://lettermint.co/roadmap/api-spam-insights.md): Already available in the dashboard, now coming to the API. See the spam score for each email after sending and understand how it was calculated. - [Email Insights (Done)](https://lettermint.co/roadmap/email-insights.md): We'll send you easy-to-understand reports about how your emails are doing. No need to log in, just check your inbox. - [Custom Unsubscribe Pages (Planned)](https://lettermint.co/roadmap/custom-unsubscribe.md): Make unsubscribe pages match your brand. Add your logo, change colors, and keep the experience consistent for your users. - [Sandbox (Planned)](https://lettermint.co/roadmap/sandbox.md): Set up your configuration and test emails without hitting real inboxes. Perfect for development and making sure everything works before going live. - [Dashboard Revamp (Done)](https://lettermint.co/roadmap/dashboard-revamp.md): We have a lot of new features planned for 2026, and the current dashboard won't cut it. So we're rebuilding it to make room for everything that's coming. We're also improving insights and filtering, making it easier to find and analyze your emails. - [Single Sign-On (SSO) (In progress)](https://lettermint.co/roadmap/sso.md): Connect Lettermint to your existing identity provider using OIDC or SCIM. Works with Okta, Azure AD, Google Workspace, and more. One less password to remember. - [Mobile App (Planned)](https://lettermint.co/roadmap/mobile-app.md): View your email insights, track delivered emails, and monitor your account from anywhere. A native app experience instead of using the website in your mobile browser. - [S3 Attachment Storage (Planned)](https://lettermint.co/roadmap/s3-attachments.md): Connect any S3-compatible storage like Scaleway, Cloudflare R2, or MinIO. We'll store inbound attachments there so you keep full control over your files. - [Email Guides (In progress)](https://lettermint.co/roadmap/email-guides.md): We're writing guides about email deliverability, sender reputation, and all those confusing email terms. So you know exactly how to get your emails delivered. - [Spend Limits (Done)](https://lettermint.co/roadmap/spend-limits.md): Disable overage completely or set a maximum budget. When you hit the limit, we stop sending. No surprises on your bill. - [Go SDK (Done)](https://lettermint.co/roadmap/go-sdk.md): Integrate Lettermint into your Go applications. No SMTP configuration needed, just install via go get and start sending. - [Python SDK (Done)](https://lettermint.co/roadmap/python-sdk.md): Works with Django, FastAPI, or any Python 3.9+ project. Supports both sync and async requests. - [Java SDK (Done)](https://lettermint.co/roadmap/java-sdk.md): Integrate Lettermint into your Java applications with a clean, type-safe API. Works with Spring Boot, Quarkus, or any JVM-based project. No SMTP configuration needed, just import the SDK and start sending transactional emails in minutes. - [Batch Email (Done)](https://lettermint.co/roadmap/batch-email.md): Bundle multiple emails and send them all at once. Fewer requests, faster processing. Perfect for imports, queues, or newsletters. - [Team API (Done)](https://lettermint.co/roadmap/team-api.md): Add domains, create projects, retrieve email statistics, and manage webhooks. All from your own application. - [Inbound Emails (Done)](https://lettermint.co/roadmap/inbound-emails.md): Build support ticket systems and process customer replies automatically. Includes spam filtering and attachment support. ## Changelog Latest updates and improvements to Lettermint - [Hide sensitive email content in your dashboard](https://lettermint.co/changelog/hide-email-content-in-your-dashboard.md): Email content can now be hidden per project or route. Keep sensitive data out of view from anyone with dashboard access. - [Team API now available in our SDKs](https://lettermint.co/changelog/team-api-now-available-in-our-sdks.md): Our SDKs have been updated to v2 and now support the Team API. Manage domains and projects and retrieve stats right from your code. - [New dashboard available in public beta](https://lettermint.co/changelog/new-dashboard-available-in-public-beta.md): We've completely redesigned our dashboard. Read about what's changed and what you can expect. - [Lettermint now available in Mailcoach](https://lettermint.co/changelog/lettermint-now-available-in-mailcoach.md): Lettermint is now available as a mailer in Mailcoach. Send your campaigns and marketing emails through Lettermint. - [Turn email tracking on or off per individual email](https://lettermint.co/changelog/email-tracking-per-email-on-off.md): Turn email tracking on or off per individual email. Decide yourself when open and click tracking is active, independent of your route settings. - [Listmonk integration, send newsletters with Lettermint](https://lettermint.co/changelog/listmonk-integration-send-newsletters-with-lettermint.md): Lettermint is now available as a preset in Listmonk. Connect your self-hosted newsletter tool to Lettermint in just a few clicks. - [Email statistics now available via the Stats API](https://lettermint.co/changelog/email-statistics-now-available-via-the-stats-api.md): Retrieve email statistics via the Lettermint Stats API. View sent emails, bounces, opens and clicks per day or per project. - [Receive a weekly overview in your inbox with Weekly Reports](https://lettermint.co/changelog/weekly-reports-automatic-email-report-of-your-performance.md): Automatically receive a weekly email report with your sending statistics, bounces, open rates and more. Always up to date without having to log in. - [Java SDK now available](https://lettermint.co/changelog/java-sdk-now-available.md): Send emails from your Java applications with our official Java SDK. Available on Maven Central, integrate via Maven or Gradle. - [Track email performance with open tracking and click tracking](https://lettermint.co/changelog/email-tracking-open-tracking-click-tracking.md): Gain insight into email performance with email tracking. View open rates and click rates with open tracking and click tracking. Privacy-first and GDPR-compliant. - [Prevent extra costs with Spend Limits](https://lettermint.co/changelog/prevent-extra-costs-with-spend-limits.md): Set a spending limit and never pay more than your subscription price. Disable overage and maintain full control over your email costs. - [Go SDK now available](https://lettermint.co/changelog/go-sdk-now-available.md): Send emails from your Golang projects with our official Go SDK. No SMTP configuration needed, integrate directly via go get. - [Python SDK Now Available](https://lettermint.co/changelog/python-sdk-now-available.md): Integrate Lettermint into your Python applications with our new SDK and easily send emails from your Python code. - [Send multiple emails at once with batch email](https://lettermint.co/changelog/send-multiple-emails-at-once-with-batch-email.md): Send up to 500 emails in a single API request with our new batch endpoint. Bundle multiple emails and send them all at once. Fewer requests, faster processing. - [Manage your account with the new Team API](https://lettermint.co/changelog/team-api-now-in-preview-manage-your-account-via-api.md): Manage your entire Lettermint environment via the API. The Team API is now in preview and offers full control over domains, projects, emails and more. - [Receive and process emails with Inbound Emails](https://lettermint.co/changelog/inbound-emails-receive-process-emails-webhooks.md): Receive and process emails automatically with Inbound Emails via webhooks. Including attachments, spam filtering and structured JSON data. - [Add inline images to emails with Content-ID (CID)](https://lettermint.co/changelog/inline-images-email-content-id-support.md): Add inline images to emails with Content-ID, without external hosting. Perfect for logos, signatures and newsletters that remain always visible. - [Prevent emails from landing in spam with Spam Insights](https://lettermint.co/changelog/prevent-emails-from-landing-in-spam-with-spam-insights.md): Spam Insights gives you visibility into all your emails sent through Lettermint and shows you how to keep your messages out of the spam folder. - [Improved Suppressions Management](https://lettermint.co/changelog/improved-suppressions-management.md): Easily manage blocked email addresses with our improved Suppressions Management. Prevent unsubscribed contacts and bounces from accidentally being emailed. - [Lettermint module for Nuxt now available](https://lettermint.co/changelog/lettermint-module-nuxt-now-available.md): Send transactional emails from your Nuxt website with our official Nuxt module. Integrate Lettermint in both client-side and server-side. - [Organize and categorize emails with tags for better overview](https://lettermint.co/changelog/organize-and-categorize-emails-with-tags-for-better-overview.md): Organize emails with tags and categorize them to maintain better oversight in your Lettermint dashboard. - [Time to Inbox monitoring page launched](https://lettermint.co/changelog/time-to-inbox-monitoring-page-launched.md): Discover how fast transactional emails really reach the inbox. From API call to inbox delivery. Real-time insights into Lettermint's Time to Inbox. - [Webhooks for sent emails](https://lettermint.co/changelog/webhooks-sent-emails.md): Receive real-time notifications of sent emails with our new webhooks feature. Integrate webhooks into your application(s) to stay updated on all email activity including status updates, bounces, and more. - [Send Campaigns and Newsletters with Lettermint Broadcast](https://lettermint.co/changelog/marketing-campaigns-newsletters-lettermint-broadcast.md): In addition to transactional emails, you can now also send marketing campaigns and newsletters with Lettermint Broadcast. Our European infrastructure ensures your marketing emails are delivered quickly and securely to your customers and subscribers. - [Developer plan now without daily limits](https://lettermint.co/changelog/developer-plan-now-without-daily-limit.md): Send up to 300 emails per month without a daily limit. We’ve removed the daily limit for the Developer plan, so you can now send up to 300 emails per month without any per-day restriction. - [Prevent duplicate emails with idempotency](https://lettermint.co/changelog/prevent-duplicate-emails-with-idempotency.md): With idempotency, you can prevent duplicate emails. This new feature ensures that your customers never receive the same email multiple times, even with repeated send attempts via our API or other integrations. - [Lettermint Integration for Magento Now Available](https://lettermint.co/changelog/lettermint-magento-integration-available.md): Send transactional emails from your Magento webshop with the new Lettermint integration. Order confirmations, shipping notifications, and account alerts now always arrive reliably. - [Lettermint Now Available on Make](https://lettermint.co/changelog/lettermint-make-integration.md): Easily connect Lettermint with various apps via Make to send transactional emails. Use a no-code solution to automate your email workflows. - [WordPress Plugin Update v1.1 Available](https://lettermint.co/changelog/lettermint-wordpress-update-v1-1-0.md): We've updated the Lettermint WordPress plugin to version 1.1.0. This update includes an improved interface and new features, including custom routes and additional insights into sent emails via WordPress. - [Lettermint Now Available on Zapier](https://lettermint.co/changelog/lettermint-zapier-integration.md): Easily connect Lettermint with over 8,000 apps via Zapier to send transactional emails. Use a no-code solution to automate your emails. - [New add-on for Unlimited Domains](https://lettermint.co/changelog/unlimited-domains-addon.md): For users who send emails from multiple low-volume domains, we are introducing the Unlimited Domains add-on. This add-on is available with our Starter and Growth plans. - [WordPress Plugin Now Available](https://lettermint.co/changelog/lettermint-wordpress-plugin.md): Easily integrate Lettermint into your WordPress website with our new plugin. Effortlessly send transactional emails from your WordPress website or WooCommerce store. - [Node.js SDK Now Available](https://lettermint.co/changelog/lettermint-node-sdk-available.md): Integrate Lettermint into your Node.js application(s) with our new SDK, and easily send emails from your JavaScript code. - [Laravel SDK and PHP SDK Now Available](https://lettermint.co/changelog/lettermint-laravel-php-sdk-available.md): Our new SDKs make it easy to integrate Lettermint with both Laravel and PHP, allowing you to quickly add email functionality to your applications. ## Blog Insights and articles about email delivery and best practices - [Lettermint turns 1 and we're just getting started](https://lettermint.co/blog/lettermint-turns-1-and-we-are-just-getting-started.md): 2025 was our first year. A look back at what we achieved and a glimpse of what 2026 will bring. - [We're making our email speed public](https://lettermint.co/blog/were-making-our-email-speed-public.md): Real-time insights into the speed of our infrastructure for delivering transactional emails from Europe. - [Welcome to the future of transactional mailing](https://lettermint.co/blog/welcome-future-transactional-mailing-europe.md): We’re excited to announce the launch of Lettermint, your European provider for transactional emails. Never worry about email delivery again — Lettermint ensures your messages are secure, reliable, and always reach your customers. ## Knowledge Base Learn how to use Lettermint effectively - [How to use a Discount Code?](https://lettermint.co/knowledge-base/account/how-to-use-a-discount-code.md): Have you received a discount code? Follow these steps to activate the code and get a discount on your Lettermint subscription. - [Verified account required to send emails, this is why](https://lettermint.co/knowledge-base/account/verified-account-required-to-send-emails-this-is-why.md): Want to send emails with Lettermint? A verified account is required. We'll explain why this is necessary. - [What is DMARC?](https://lettermint.co/knowledge-base/definitions/what-is-dmarc.md): If you send emails with your domain, you undoubtedly have a DMARC record in your DNS. But what is DMARC and what does it do? We'll explain it to you. - [What is SPF?](https://lettermint.co/knowledge-base/definitions/what-is-spf.md): SPF protects your domain against email abuse. Learn how to set up SPF, what the limits are, and how Lettermint cleverly handles SPF via Return-Path. - [What is DKIM?](https://lettermint.co/knowledge-base/definitions/what-is-dkim.md): DKIM adds a digital signature to your emails. Discover how DKIM works, why it's important, and how to set it up with Lettermint. - [What is DKIM2?](https://lettermint.co/knowledge-base/definitions/what-is-dkim2.md): DKIM2 is the next version of DKIM with improved security and support for forwarded emails. Learn what DKIM2 is and why it matters for email authentication. - [What is SMTP?](https://lettermint.co/knowledge-base/definitions/what-is-smtp.md): SMTP is the protocol behind email sending. Learn what SMTP is, how it works, which ports to use, and why proper configuration matters for deliverability. - [What is MX (Mail Exchange)?](https://lettermint.co/knowledge-base/definitions/what-is-mx.md): An MX record tells mail servers where to deliver emails. Learn what an MX record is, how it works and why it matters for email delivery. - [What is the List-Unsubscribe header in newsletters and marketing emails?](https://lettermint.co/knowledge-base/definitions/what-is-list-unsubscribe-header.md): The List-Unsubscribe header lets recipients unsubscribe with one click. Learn how it works, why Gmail and Yahoo require it, and how to set it up. - [What are email headers and what do they tell you about your emails?](https://lettermint.co/knowledge-base/definitions/what-are-email-headers.md): Email headers contain information about the sender, routing, authentication and more. Learn what headers are and how to use them. - [Understanding email statuses: hard bounce, delivered, pending, and more](https://lettermint.co/knowledge-base/deliverability/understanding-email-statuses-hard-bounce-delivered-pending.md): Discover the meanings of email statuses like hard bounce, delivered, and pending to enhance your email deliverability and campaign performance. - [Test emails with our test email addresses and prevent problems](https://lettermint.co/knowledge-base/deliverability/test-emails-with-our-test-email-addresses-and-prevent-problems.md): Send test emails using our test email addresses and prevent your emails from being marked as spam or unsafe. Free to use for Lettermint customers. - [What is greylisting and why doesn't email arrive immediately?](https://lettermint.co/knowledge-base/deliverability/what-is-greylisting-why-email-delayed.md): Email not arriving right away? Greylisting is often the cause. Learn what this antispam technique is, how it works and how to prevent email delays. - [How to prevent your emails from going to spam during holidays (Gmail & Outlook)](https://lettermint.co/knowledge-base/deliverability/prevent-emails-spam-holidays-gmail-outlook.md): Gmail and Outlook spam filters get stricter during Black Friday, Cyber Monday, and holidays. Learn how to keep your emails in the inbox, not spam. - [What is an email subdomain and when should you use one](https://lettermint.co/knowledge-base/deliverability/what-is-an-email-subdomain-and-when-should-you-use-one.md): Learn what an email subdomain is and why it's crucial for transactional emails. Including when to use subdomains and how to set them up. - [Why is my email blocked? Policy Rejected explained](https://lettermint.co/knowledge-base/deliverability/why-is-my-email-blocked-policy-rejected-explained.md): Your email gets the Policy Rejected status when the spam score is too high. Learn why this happens and how to make sure your emails get delivered. - [Outlook blocks SVG images in emails, here's what you need to know](https://lettermint.co/knowledge-base/deliverability/outlook-blocks-svg-images-in-emails.md): Microsoft blocks SVG images in Outlook since 2025. Find out why and which alternatives you can use in your emails. - [Stop bot signups and prevent spam complaints and delivery issues](https://lettermint.co/knowledge-base/deliverability/stop-bot-signups-prevent-spam-complaints.md): Bot signups cause spam complaints and damage your sender reputation. Learn how CAPTCHA, honeypots and IP blocking protect your forms. - [Why are my emails going to spam? Common causes and how to fix them](https://lettermint.co/knowledge-base/deliverability/why-are-my-emails-going-to-spam.md): Your emails keep landing in the spam folder, but you're not sure why. Learn the most common causes and what you can do to reach the inbox again. - [Integrate Lettermint in WordPress with WP Mail SMTP](https://lettermint.co/knowledge-base/guides/integrate-lettermint-with-wordpress-wp-mail-smtp.md): Do you want to use Lettermint in WordPress to send emails? With the free `WP Mail SMTP` plugin, it's very easy. - [How to send a newsletter with Mailcoach and Lettermint?](https://lettermint.co/knowledge-base/guides/mailcoach-send-newsletter-with-lettermint.md): Send your newsletter with Mailcoach and Lettermint. This guide walks you through connecting Lettermint to Mailcoach for email delivery. - [How to set up Apple Branded Mail for your business or brand?](https://lettermint.co/knowledge-base/guides/how-to-set-up-apple-branded-mail-for-your-business.md): Set up Apple Branded Mail for your business. Display your logo in Apple Mail with this free step-by-step guide. Works automatically with Lettermint. - [Using Lettermint SMTP for Synology Email Notifications in DSM](https://lettermint.co/knowledge-base/guides/lettermint-smtp-synology-email-notifications-dsm.md): Use Lettermint SMTP to send email notifications from your Synology NAS. Follow this step-by-step guide to set up Mail Notifications. - [How to add DNS records to Cloudflare for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-cloudflare.md): Step-by-step guide to add DMARC, DKIM and DNS records to Cloudflare to send transactional emails with Lettermint. - [How to add DNS records to Domain Chief for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-domain-chief.md): Step-by-step guide to add DNS records to Domain Chief to send transactional emails with Lettermint. - [How to add DNS records to TransIP for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-transip.md): Step-by-step guide to add DNS records to TransIP to send transactional emails with Lettermint. - [How to add DNS records to Neostrada for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-neostrada.md): Step-by-step guide to add DNS records to Neostrada to send transactional emails with Lettermint. - [How to Add DNS Records to AWS Route 53 for Lettermint?](https://lettermint.co/knowledge-base/guides/add-dns-records-aws-route-53.md): Step-by-step guide to add DNS records to Amazon Route 53 to send transactional emails with Lettermint. - [How to send a newsletter with Listmonk and Lettermint?](https://lettermint.co/knowledge-base/guides/send-newsletter-with-listmonk.md): Send your own newsletter with Listmonk and Lettermint. This guide walks you through connecting Listmonk to Lettermint for email delivery. - [Send without domain limitations using our add-on](https://lettermint.co/knowledge-base/product/unlimited-domains-with-lettermint.md): With the Lettermint Unlimited Domains add-on, you can use an unlimited number of sending domains with our Starter and Growth plans. - [What is the Difference Between Transactional and Broadcast Emails?](https://lettermint.co/knowledge-base/product/difference-transactional-broadcast-emails.md): Discover the difference between Transactional and Broadcast emails for optimal delivery directly to your recipients' inboxes. - [Why is there an automatic unsubscribe link in broadcast emails?](https://lettermint.co/knowledge-base/product/why-automatic-unsubscribe-link-broadcast-emails.md): Discover why an unsubscribe link is required for broadcast emails under GDPR. Learn how it protects your sending reputation and when you can disable it. - [What is Delivery Health and does it affect your emails?](https://lettermint.co/knowledge-base/product/what-is-delivery-health-and-does-it-affect-your-emails.md): Delivery Health is a status in your Lettermint dashboard that shows how your email sending is doing. Learn what it means and when to take action.