[Mailman-Users] Rejecting spam at the SMTP level?

[Andrew Hodgson]

Jayson Smith wrote:

>I've been running several Mailman lists for the past ten years or so. 
>Unfortunately, in recent months some list addresses have fallen into the hands of spammers, which is a real headache. Even worse, one particular -owner address is receiving nothing but spam, and I don't assume there's >anything I can do about that without disabling that address for legitimate use, as well as for use by Mailman itself.

>A few months ago I did some Googling and found a project called Mailman-Milter which claims to reject unwanted list mail i.e., nonmember postings at the SMTP level. I would love to use this, but there's virtually no >documentation and I've never been able to get it working. 
>Has anyone else had any better luck, or do you know of any other solutions? I'm using Sendmail, by the way.

We had the same issue with our lists and I decided to install SpamAssassin on the server that rejects at SMTP level.  After a small bit of tuning we have this working really well, it doesn't interfere with list traffic, but rejects a lot of rubbish to the owner and other addresses.

HTH.
Andrew.