-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Julie S. Lin wrote: > Hi > > is there a way to filter by originating mailserver? > > ... > > or have spammers figured out how to forge originating mail server > identity too?
Spammers quite probably author their email content in this way. However, various techniques have been developed to allow receiving SMTP servers to block mail alleging to come from domain X, but not actually being sent by that domain. One such technique is SPF (http://www.openspf.org/). Another is Domain Keys (http://antispam.yahoo.com/domainkeys). Unfortunately, both these methods require the system administrator for each and every email domain to perform some configuration. As such, neither technique is as widely adopted as one would like. Still, one of both of the above techniques is configured for a number of commonly forged source domains such as hotmail.com, yahoo.com and others, so they'll certainly help out at least partially. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFdHl4hk3bo0lNTrURAiXUAJwPojb5Al1AMidYb+5DfXbjW/IYBQCfXMEd dgzSKURnD4tzKmlBXelenxo= =sdQs -----END PGP SIGNATURE----- _____________________________________________ tmda-users mailing list (tmda-users@tmda.net) http://tmda.net/lists/listinfo/tmda-users
