Re[3]: Postfix with IMAP

Hello David,

D> Jeff, referencing a table in the database sounds like
D> a great idea.  I will give that a try.  I am using
D> Postgres so I will probably need to do a bit of
D> recompiling.

I had a link to the Postgres patch for Postfix, but it was for a
non-current version. Everywhere I found the patch, I found references
to other sites (most not working) where the "latest" version would be
found... I gave up searching. MySQL scales just fine for our systems.

D> When you refer to the local user mapping, are you
D> talking about this entry:

D> local_recipient_maps = $alias_maps unix:passwd.byname

Yes, that's the entry. In my case, since I'm using MySQL, my main.cf
entry is just:

local_recipient_maps = mysql:/etc/postfix/users.cf

and users.cf contains the information necessary to attach to the
dbmail aliases table.

If you don't do this, Postfix will accept all mail going to the
domains configured, then dbmail will bounce what it can't handle...
and spammers like that method. It's the unplugable spam relay hole in
Exchange, Notes, and some other MTAs, in that you can send spam to an
invalid address on the target server, claiming to be the target email
address - the bounce will go to your target, complete (usually!) with
your spam as an attachment.

-- 
Best regards,
 Jeff                            mailto:jbrenton@xxxxxxxx