Search code examples
smtppostfix-mtaspam-prevention

Postfix: transport_maps SMTP ignores header_checks

I have a working SMTP setup in Postfix

transport_maps = hash:/etc/postfix/transport
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

All is good with the SMTP, however now Postfix ignores the header_checks

header_checks = pcre:/etc/postfix/header_checks

or

smtp_header_checks = pcre:/etc/postfix/header_checks
  • Is there a priority of operations, like "use transport and stop"?
  • If yes, what could be a way to apply header_checks before transport?

Thank you!

Solution

  • I am not 100% sure why, but when I changed transport map from *:

    * relay:[THE_SMTP_HOST]:587

    to

    [email protected] relay:[THE_SMTP_HOST]:587
[email protected] relay:[THE_SMTP_HOST]:587

    the header_checks started working.

    (I tried .domain.tld - SMTP stopped working at all)