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Domains

Domain verification

Verify a domain you control before sending email from it. This tells inbox providers that Lettermint is allowed to send on your behalf and helps protect your domain from spoofing.

Choose a sending domain

We recommend using a subdomain such as mail.acme.com instead of your root domain acme.com. This separates your sending reputation from your website and regular business email.

Add and verify your domain

1. Go to Domains and select Add domain
2. Open the domain's DNS page and add all setup records to your DNS provider
3. Return to Lettermint and select Verify all

Copy the record type, name, and value exactly as shown. DNS changes often appear within minutes, but can take up to 48 hours.

For previously verified domains, this mismatch shows a warning and does not stop sending. The notice stays visible until a DNS check finds the corrected record.

Authentication records

Your domain's DNS page shows the exact records you need.

Automatic DKIM rotation

Your DNS page may show two DKIM CNAME records, lm1._domainkey and lm2._domainkey (selectors lm1 and lm2). Add both and leave them in place. Lettermint uses the pair to rotate signing keys automatically, without asking you to change DNS again.

Updating an existing domain

If the DNS page offers a DKIM update, follow the guided steps. Add both new CNAME records and keep your current DKIM TXT record in place until the dashboard confirms that the update is complete. Sending continues while the update runs.

Troubleshooting

If a record remains pending:

• Check that its type, name, and value match the dashboard exactly
• Check whether your DNS provider automatically appended your domain name
• In Cloudflare, set CNAME records to DNS only
• Wait for DNS propagation, then select Verify all again

DNS provider guides

Next steps