From: Matthias Andree (no email)
Date: Sun Sep 01 2002 - 08:44:06 EDT
Friedrisch Muller <> writes:
> I read at
> http://www.monkeys.com/anti-spam/filtering/additions.html
> that Monkeys have created a wonderful patch for
> Postfix that checks if the senders from-address
> matches the first sending server which seem to be an
> easy way to reduce _a lot_ of spam with sender from
> addresses like Hotmail, Yahoo, Excite, and so on...
The approach is not going to work.
a) misconfigured and trivial (alias-type) mailing lists that use the
original envelope sender will be caught
b) you won't ever get to see my mail as soon as one of my sender domains
is listed, because my envelope sender is the same as my From: address
usually, but I send it from a T-Online dialup pool -- and if that's
not working for rampant DUL rejections, I'll relay it through
Dortmund University (SMTP AUTH, not to worry about) -- which may well
fail because I'm using a e-technik.uni-dortmund.de domain and the
relaying host has a hrz.uni-dortmund.de domain, or because I use one
of my freemailer sender addresses.
Using the respective relay that matches the From: or envelope sender
address is not going to work, because a) Postfix' support of this is
undocumented as of now, b) I cannot look at the ISP's mail queue, mail
logs and I have no control over their retry schedule and queue ordering
and whether they tune their queue runner or not. Usually, sending mail
directly is faster and more reliable.
I will NOT work around rampant spam filtering usually unless I know you.
-- Matthias Andree - To unsubscribe, send mail to with content (not subject): unsubscribe postfix-users
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