On February 2, 2010 9:57:12 AM +0100 Steffen Kaiser <skdovecot@smail.inf.fh-brs.de> wrote:
IMHO: If you want to avoid backscatter, you must disable the user in the MTA, in order to reject the message during "rcpt to" command or at least in DATA.
I don't care about backscatter. There's no reason anyone should see significant backscatter these days; it's pretty much a solved problem.
(watermark all outgoing email and look for that watermark on DSN reports)
In any event, for this specific case I do already reject the user "at the gates". But I want to reject internal email for folks that don't know that user account has gone away. I prefer not to do it in the MTA so as to keep the MTA as free from this type of configuration that lingers for years and makes future migrations difficult.
-frank