I have started to receive spam with a valid recipient address in my domain, an envelop sender which is an invalid address in my domain and a Delivered-To header already present showing it was delivered to the addressed recipient.
Without the Delivered-To header the normal thing would happen, it would be quarantined by my spam filters. Because the header is already there, Courier says "Mail loop", and tries to send a DSN to the invalid address. That fails, so it goes to Postmaster. That forwards to me and the spam filters quarantine the mail. The end result is still the same, sort of. I don't know if including the Delivered-To header is an effort to get around spam filters or just an incompetent spammer. I could stop this by rejecting mail that fails SPF but then I have the classic problem of rejecting all the mailing list mail I receive. It seems like everything is happening just the way it is supposed to and anything I might do to respond to this will just break something. Is anybody else getting these kinds of spams? Should I do anything about it? Bill ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
