Blocking subdomain email via DNS

gbh1935

Active Member
Jun 25, 2005
26
0
151
I get a ton of spammers trying to dump email to my server via random names against subdomains of a domain. ie [email protected]

Is there a way at the dns level to kill off any and all subdomain MX traffic?
 

Miss Jacky

Well-Known Member
Mar 4, 2004
91
0
156
Hmm, maybe make bogus MX records for each subdomain, like

subdomain.domain.tld MX 0 imnotamailserver.tld.

If that makes any sense.