[Mimedefang] Spammers who won't take no for an answer

[David F. Skoll]

On Wed, 22 Oct 2003, Kenneth Porter wrote:

> Does it make sense to code a fixed delay in the response code for 5xx and
> 4xx replies, say 1 minute?

Not on a busy mail server, that's for sure.  You'll get Sendmail processes
piling up very quickly...

Hosts that resend often in response to a 5xx code should be firewalled
off or null-routed.  It's too expensive to try to handle them at the
application layer.

--
David.