Complete Email Authentication Setup for PostMTA
DNS Records
SPF:
v=spf1 include:_spf.postmta.com ~all
DKIM (PostMTA auto-generates):
postmta._domainkey IN TXT ( "v=DKIM1; k=rsa; p=YOUR_KEY" )
DMARC:
v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; pct=100
PostMTA Features
- Auto DKIM signing per domain
- SPF alignment mode
- DMARC aggregate reports in dashboard
- Automatic failover routing
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