>Try this: > >my.domain MX 5 primary.mail.server >my.domain MX 10 secondary.mx.server >my.domain MX 20 another.name.for.primary.mail.server > >Spammers have learned that backup MX's accept more spam. Making your >primary a 'tertiary' server as well gets them to try it first >instead of the real backup.
I implemented this a while back. It's hard to normalize the effectiveness of this approach compared to the other spam fighting tools in SIMS without a lot of log analysis. But it does make a difference. The separate problem is, of course, if your primary disappears off the net for whatever reason, so does the tertiary, and the spam still comes through the secondary. Not all spammers must be idiots though I guess. Since I still have spam coming through my secondary, they must eventually try them all? How does this work anyway in general? If another mail server wants to find mx.4pi.com (me), does DNS -always- give it my highest priority server? I guess spam programs can "intelligently" search for other MX records and send to all? Stefan Jeglinski ############################################################# This message is sent to you because you are subscribed to the mailing list <[EMAIL PROTECTED]>. To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
