Bob McClure Jr wrote:
Two of the great things I have gleaned from this list are:
1. Greylisting is reported to stop upwards of 80-90% of the spam from
even coming in the door. The downside is the likely delays imposed
on the rest of the mail, maybe in terms of hours.
2. Spammers seem to be attracted to secondary MXs.
This morning, in the shower (where many great ideas are born), it
occurred to me that if one combined the two concepts, i.e. implement
greylisting on (only) the secondary MX server, one might get all the
benefits with no downside.
Have I missed something?
Cheers,
It certainly sounds like a good idea. I guess the real question is: if
the spamming software in use is given a temporary failure when trying to
send to the secondary MX server, will it immediately try to send to the
primary server? If so, your idea will have no impact. If you could
set this up as a test, it would be most interesting to hear the results.
Kevin
