"Taymour A. El Erian" <[EMAIL PROTECTED]> writes:
> Hi,
>
> Lately I am having problem with spammers who change their mailfrom
> (I have spamguard which can block spammer by e-mail) with each message
> they send and the same time they send only one e-mail in a connection
> so tarpitting is not working with them. Does any one have a valid
> solution other than using something like spamassassin. I need
> something that should work on the network level not the smtp level and
> with minimum load.
Have you yet explored DNSRBL - i.e. IP-based blocking?
Recently I patched my qmail-ldap installations so y can also use njabl's
open-realy detection mecanism. That is: each IP which send's email to
one of my servers is chequed if it is an open-relay (in case it is not
yet listed anyway). So repeated spamming via an open-relay is
prevented.
Regards,
Jorge-Le�n
