Steffen Kaiser wrote:
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On Sun, 18 Jan 2009, Seth Mattinen wrote:
As a mail admin, I never want to see deliver generating its own
messages to potentially forged addresses and spamming innocent people.
The MTA should do this during the SMTP transaction.
Which MTA tries to deliver the mail during the SMTP dialogue?
Neither Postfix nor sendmail does, unfortunately. Well, one would open
yet another can of worms, if doing so, I guess.
Postfix. Will it do it out of the box? No. You can add hooks to Postfix
using the pre-queue content filter, milter, access policy delegation or
patches so that it can respond with a defer/reject during the SMTP session.
http://www.postfix.org/SMTPD_PROXY_README.html
http://www.postfix.org/MILTER_README.html
http://www.postfix.org/SMTPD_POLICY_README.html
I'm sure there are tools out there developed to take advantage of these
interfaces that do what I'm alluding to, but I don't know any off the
top of my head and I can't share mine.
~Seth
