Costin Guşă wrote:
however i'm wondering if my proposed implementation would *really* catch not only all relayed mail but also internal clients sending mail to internal clients ?
To only catch outbound mail, use something like this (note smtpd_SENDER_restrictions):
# main.cf smtpd_sender_restrictions = permit_auth_destination static:holdThis requires the default setting "smtpd_delay_reject = yes", so don't change it.
-- Noel Jones