RE: [Exim] @mx_any and 127.0.0.1

Bruce Richardson wrote:
> It's entirely valid to have a domain that will never send or receive
> mail. The problem is that the lack of an MX record will not prevent
> MTAs from trying to deliver mail to that domain: they'll just fall
> back on the A record. If someone forges that domain in the return
> path on a large batch of spam then a whole bunch of NDRs will be
> coming his way. With no MX record, the MTAs will fall back to the A
> record and if there happens to be one then a certain amound of time
> and bandwidth wasted while mailhosts try to open smtp connections.

Fair enough, but in this instance all his records were set to 127.0.0.1.
Simply removing all the hosts from the zone would be a much better solution,
no?

Steven
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Steven Dickenson <sdickenson@???>
Network Administrator
The Key School, Annapolis Maryland