Warning: Database is older than source file /etc/aliases
newaliases
postfix reload
DNS Standards
According to DNS standards (RFC 2181, Section 10.3), MX records should reference a domain name, not an IP address.
The domain name should then resolve to an IP address via an A or AAAA record.
- postfix check
- saslfinger -s
- dig DOM.TLD MX +short
- DOM.TLD. IN MX 10 mail.DOM.TLD.
- mail.DOM.TLD. IN A IPADDRESS
- PTR Record:
- Contact your ISP or hosting provider to update the PTR record for IPADDRESS to point to mail.DOM.TLD.
- https://support.mailroute.net/hc/en-us/articles/360063327833-Postfix-SMTP-Response-Errors
- https://pamtester.sourceforge.net/
- https://www.mail-tester.com/
- https://www.checktls.com/TestReceiver
- https://www.postfix.org/postconf.5.html#smtp_tls_loglevel
- https://www.postfix.org/DEBUG_README.html
Hetzner Cloud