Matt wrote: >> First - use dummy MX records. Real mail retries. Botnet and must >> spammers don't. It's easier for them to try to spam someone else than to >> fight your filter. MX config is as follows: >> >> dummy - 10 >> real - 20 >> real-backups - 30 >> dummy - 40 >> dummy - 50 >> dummy - 60 > > Currently I have mail.mydomain.com as 10. Can I just change that to > 20 and add mail5.mydomain.com as 10 but not have an IP associated with > mail5.mydomain.com or will that cause trouble? > > Matt >
Are you sure about this approach? Most of what hits our backup server, listed at a higher MX record, is spam. I was, and am, under the impression that many spambots are set to fire at higher MXs under the assumption that admins might not spend as much time on the anti-spam set-up of this servers.
