Tags
postfix

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.

  1. https://docs.hetzner.com/cloud/servers/faq/#why-can-i-not-send-any-mails-from-my-server 
  2. postfix check
  3. saslfinger -s
  4. dig DOM.TLD MX +short
    • DOM.TLD. IN MX 10 mail.DOM.TLD. 
    • mail.DOM.TLD. IN A IPADDRESS
  5. PTR Record:
    • Contact your ISP or hosting provider to update the PTR record for IPADDRESS to point to mail.DOM.TLD.
  6. https://support.mailroute.net/hc/en-us/articles/360063327833-Postfix-SMTP-Response-Errors 
  7. https://pamtester.sourceforge.net/ 
  8. https://www.mail-tester.com/ 
  9. https://www.checktls.com/TestReceiver 
  10. https://www.postfix.org/postconf.5.html#smtp_tls_loglevel
  11. https://www.postfix.org/DEBUG_README.html
Hetzner Limits Request