Freshly Minted: what's new in August

Welcome to the third edition of Freshly Minted, our monthly round-up of everything we've built at Lettermint, including the smaller improvements that never quite make it to the changelog. August is quiet on most calendars. Ours wasn't, and we promised you something last month.

Lettermint is ISO 27001 certified

Time for some confetti. Lettermint is now certified to ISO/IEC 27001:2022, the international standard for information security. An independent auditor has reviewed how we protect your email data and confirmed that it holds up in practice, not just on paper.

For most of you, nothing changes in how you send. What changes is what you can prove. Next time someone at work reviews Lettermint as a vendor, point them to the certificate in our Trust Center (opens in a new window). The certificate itself is framed and hanging in the office. Read the full story.

Rotate your DKIM keys automatically with managed DKIM

A DKIM key is something you set up once and then forget about. For years, usually. Security guidance says it should have a limited lifespan, and if you work to a standard like ISO 27001 you need to show that it does.

With managed DKIM that's now on us. Every six months we replace the key we sign your email with, without interrupting your sending. Two CNAME records in your DNS take turns, so recipients keep verifying your email while the switch happens. Need a new key sooner? Start the rotation yourself from your dashboard.

New domains get managed DKIM from the start. Domains you added earlier can switch over from the DNS page whenever it suits you. Read the changelog.

Enforced TLS for sensitive email

When we deliver your email, we encrypt the connection to the recipient's mail server as soon as the other side supports it. Whether that happens is up to the receiving server. If it doesn't support TLS, the email still arrives, just unencrypted. For a newsletter that's rarely a problem. For an invoice or a patient record it might be.

With Enforced TLS you decide. Set a route to Enforced and everything on that route is only delivered over an encrypted connection, or not at all. Everything else stays on Opportunistic, the default. Read the changelog.

Import and export your suppressions

Every hard bounce and every unsubscribe lands on your suppression list, and we check that list before every send. Until now you could only work with it one address at a time.

Migrating from another provider? Upload their list as a CSV and the addresses you already know are trouble stay blocked from day one. Running your own marketing tools alongside Lettermint? Export the list, filtered the way you would in the overview, so both systems know the same opt-outs. And when a block shouldn't last, like a mail server that was down for a day, tick the rows and unblock them in bulk. Read the changelog.

Improvements & fixes

Beyond the headliners, we polished a lot of smaller things too:

• Webhooks with scope: one webhook for your whole team, a set of projects or a set of routes, instead of one per route. Every payload now tells you which project and route it came from, and two new events fire when an address is added to or removed from your suppression list. Read the changelog.
• Better open and click detection: we improved how we filter out scanners and other automated opens, so your rates are more accurate. Tracking stays opt-in, per route.
• Proton Mail on Time to Inbox: our public delivery speed monitor now includes Proton Mail, next to Gmail, Outlook, iCloud and the rest. See the numbers.
• Multiple tags per email: next to the single tag you can now attach up to 20 name and value pairs, like campaign=welcome, and filter on them.
• Keep your own Message-ID: relaying from a ticketing system? Ask us to preserve your Message-ID and replies thread back to the right ticket.
• Block disposable addresses: a new route setting suppresses recipients on throwaway email services before they hurt your list quality.
• Edit pending invitations: change the role or fix the email address without deleting and resending the invite.

This month again, a good share of this started as a message from someone using Lettermint. So keep it coming. You can reach us through the dashboard or Discord. We read every message and genuinely build with it.

See you in September, when the out-of-office replies stop.