> Alan Cooper wrote: > >> We have a customer who is making fairly heavy use of message filtering >> (approximately 50 rules) to filter out his email. >> >> On a fairly regular basis, a substantial number of blank emails appear >> in the destination folder (Unknown sender, (no subject) for subject and >> 0K in size) >> >> Has anyone seen this before and is there a resolution? > > I see many of these on several Linux/Sendmail/Cyrus IMAP server. As far > as I could determine, they are actual deliveries of completely empty > mails. Perhaps some malfunctioning spammer tool or worm, as they do tend > to crop up mainly on accounts who also get a lot of maltraffic.
Check ip address in first received: header. I suspect that you will find it in cbl.abuseat.org listing. My last borked email was from address listed that that RBL. ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com -- squirrelmail-users mailing list List Address: [EMAIL PROTECTED] List Archives: http://sourceforge.net/mailarchive/forum.php?forum_id=2995 List Info: https://lists.sourceforge.net/lists/listinfo/squirrelmail-users
