[Bencsath Boldizsar]

But the mail, that was distributed by the list contains a header: From: Szecsei@sas.fph.hu, =?iso-8859-1?Q?Vir=E1g?= <fszecsei@mail.matav.hu>

I'm not sure, it might be a problem in sendmail or anything, i thing the original address was From: Szecsei, Vira'g <fszecsei@mail.matav.hu>

This very much sounds like something that the MTA, and not Mailman, would do.

RFC822 specifies that addresses in the From: header should not be unqualified, and thus many MTAs try "fixing" such broken headers by adding and "@" and some local domain.

I think trying to implement something in Mailman to stop messages whose headers appear to have been subject to such (possibly incorrect) address qualification, would be:

1. Very nearly impossible to get anywhere close to correct
2. Uncalled for. This is simply not a job Mailman should take on

Basically the problem in Szecsei's case is that he inserted a "," in the real name part of his From address, thereby really making it into _two_ separate addresses (one of them unqualified). The problems start with the insertion of that pesky extra ",", and that's where this should be fixed.

Harald