On Mon, Mar 9, 2009 at 6:49 PM, Noel Jones <njo...@megan.vbhcs.org> wrote: > 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:hold > > This requires the default setting "smtpd_delay_reject = yes", so don't > change it.
Oh, many thanks for enlightening me with the 'static:HOLD' hint! Despite reading the docs, it wasn't until your answer came to understand what "foobar" really meant in postconf man page: "For example, static:foobar always returns the string foo-bar as lookup result." Maybe I could have understood it easier if the example phrase contained a real example keyword such as "REJECT" instead of "foobar" :)
