If Return-Path doesn't contain user and domain, treat it as missing Return-Path.
If Return-Path doesn't contain user and domain, treat it as missing
Return-Path.

damoxc/dovecot,damoxc/dovecot,Distrotech/dovecot,damoxc/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,Distrotech/dovecot,damoxc/dovecot,damoxc/dovecot