I'm currently getting mailbombed with bounce messages because of the
interaction between cyrus and sendmail (sendmail accepts spam message
for unknown user, passes message to cyrus, cyrus rejects message,
sendmail bounces back to non-existent address forged by spammer,
remote mail server sends bounce message to the postmaster, me).
I know this is a known issue and the question has come up quite a few
times in the archives (search "smmapd" if you're curious), but a few
years have passed since the last activity that I can find (2005), and
I'd like to know if there is any way to avoid this problem _without_
This page outlines the steps that need to be taken, involving patching
http://ftp. *** ape.cc/pub/anfi.homeunix.net/sendmail/rtcyrus2.html
And the official cyrus site only says, "Cyrus also includes a socket
map daemon smmapd ... To use this daemon, add smmapd as a service in
cyrus.conf and configure Sendmail accordingly.":
Basically, I'm wondering if in 2008 "configure Sendmail accordingly"
can be down without patching. I'm running sendmail 8.13.8-2.el5 and
cyrus 2.3.7-1.1.el5 (provided by Red Hat with RHEL 5.1). I didn't
actually choose cyrus myself, it was just the "official" imap solution
provided; things were a bit easier with UW-IMAP.