>...
>| One possibility is to list your primary again as the tertiary, possibly
>| under a different name and/or IP address. Spammers that deliver in reverse
>| MX order will still end up trying to deliver to your primary first.
>
>I tried this and it resulted in mail loops when one of the servers was down.
>I like the suggestion below better.
>
>QQQQ
>
>| You could also list a bogus server in IP "dark space" (ie. an address
>known
>| to have no listening server) so that the spammer must first check the
>empty
>| address first. Even better is when there's a host there that drops packets
>| (no TCP reset or ICMP port unreachable reply) to port 25, so that the
>| spammer must time out the TCP connection attempt.
>|
>|
>
Be very careful if the "dark space" is not under your control. Using
a reserved address will get you a rfci listing, using somebody else's address
in the US is fraud (of course IANAL). If you do have the space, the best thing
is probably to setup a *very* slow server, that always gives a 4xx at the end of
the conversation and preferably is doing greylisting too (look at the program
from OpenBSD or NetBSD unfortunately also called "spamd" - part of "pf").
Paul Shupak
[EMAIL PROTECTED]
