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

[Kenneth Porter]

--On Wednesday, October 22, 2003 9:02 PM +0200 Jonas Eckerman 
<jonas_lists at frukt.org> wrote:

> Not only did one of those hosts repeatedly try to send the same
> message, it did if fast. The shortes delay between a failure and the
> next connect was about 0.25 seconds, the longest was 7 seconds. :-(

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