Domains
DNS records
Postwick asks for three records. Here is what each does.
DKIM
A public key published as a TXT record. Postwick signs each message with the matching private key; the receiver checks the signature against the record.
SPF
A TXT record listing the servers allowed to send for the bounce subdomain.
MX
Routes bounces and complaints back to Postwick, so we can suppress addresses that no longer exist.
Add a DMARC record on the root domain once everything verifies. Start with p=none and tighten it after a week of clean reports.
_dmarc.lumen.dev TXT "v=DMARC1; p=none; rua=mailto:dmarc@lumen.dev"Was this page helpful?