Mail and SMTP

Version 7 by Stephane Carrez



Problems & Solutions

SPF issues

  • EHLO miss-match between announced name, IP and reverse
  • missing TXT SPF record for the announced EHLO name

Example: if MX is

  • reverse DNS of server IP must be
  • there must be a TXT record '' with v=spf1 a mx -all

verify with

See SPF Common Mistakes