martin f krafft: > My theory was that spammers would try the lowest priority MX first > (primary-1.mx), in this case the second IP on the main MX.
With my two MX records pointing to one host, about 10% of spambots
goes to the backup IP address only. Thus, MX policy enforcement
stops only a small portion of mail that postscreen can't already
stop otherwise. Other (small) sites may see different results but
I don't expect large differences.
Wietse
