hi- short version: i have an mx which, after doing the initial handling [postscreen, etc] of messages arriving from the internet, relays mail to another computer for content filtering [amavis/spamassassin]:
relay_transport = lmtp-filter:[mfa.example.com]:lmtp-filter-external after a message has been accepted, i'd like to delay its relay to the content filter for five minutes. can postfix do this? longer version: i've noticed a recent trend in which a message arrives, passes postscreen/various smtpd_*_restrictions, and is passed to the content filter, which passes it as clean, having not matched many rules [in particular, network tests like uri dnsbls, razor/pyzor, etc]. minutes later, the same message arrives [timestamps, message ids, etc differ], in that time has made its way into the results of various network tests, and is then marked is spam. e.g. my consideration for this approach. i'd also be interested in general thoughts on this problem, and other possibilities. i'm not particularly fond of artificial delays, and the various implications [e.g. queue sizes, user expectations, etc], but in the context of a controlled environment [e.g. after postfix has accepted the message, i'm willing to at least entertain the possibility. thanks-ben
