"Marcin M. Jessa" <[EMAIL PROTECTED]> writes:

> Somehow I ended up on some spamming list(s).
> I receive plenty of Klez emails every day.
> What concerns me is the sender's address. The emails appear to come from valid email 
>addresses, like squirrelmail.org developers or even mailinglists like 
>[EMAIL PROTECTED] (one of the rescent ones)

When you say "sender's address", do you mean the envelope sender or
are you referring to the From header field?  The From field can be,
and usually is, completely bogus in typical SPAM email.  If you are
expecting something meaningful in that field, you'll probably want to
adjust your expectations! :)

> How can I avoid sending emails to an entire mailinglist? 

TMDA doesn't send its confirm request emails to the address in the
>From field.  It sends it to the envelope sender address.  You can see
that address in your incoming log file, if you've enabled
LOGFILE_INCOMING in your ~/.tmda/config.  The envelope sender is
labelled "Sndr:" and the From field is labelled "From:".  If they are
exactly the same, only "From:" will be shown.

Also, if mail originated from a mailing list, TMDA will notice the
appropriate list headers and will not send confirmation requests.

> I know I could set up my server to disallow emails from someone
> who's email address does not match with the IP of the MX sending the
> emails.

It's not a very good solution.  People often send mail from different
machines than where they expect replies to go (the MX of their email
address).  You would reject all legitimate mail that fits that profile.

> Is that the only sollution?

First, double-check that you really have a problem.  Enable
LOGFILE_INCOMING (if you haven't already) and check to see if the From
header is different from the envelope sender.  The envelope sender is
the only one that matters.


Tim
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