Re: [Exim] Kool Spam Catching Trick

On Jan 1 Marc Perkel wrote:

>What I did was set a secondary MX record to be another IP on the same
>computer as my primary email server. I had noticed that some spammers
>often will email the secondary rather than the primary MX believing that
>the secondary has less filtering. In my case there never is a time when
>the secondary is up and the primary is down. So - anything coming into
>the secondary is spam.

You can't guarantee this. However, you can send SMTP 451 (defer) to
anything arriving on the secondary ;)