On Sun, Dec 31, 2006 at 12:42:17PM +1100, Anand Kumria wrote:
> Package: greylistd
> Followup-For: Bug #405030
>
> The other to keep in mind is that the RFCs (2822, 2821) specify a 15
> minute retry interval as the lower bound for well behaving MTAs.
RFC 2821 describes the protocol, and it would help if you actually read it
before specifying so exactly :) because the relevant stuff is:
4.5.4.1 Sending Strategy
[...]
The sender MUST delay retrying a particular destination after one
attempt has failed. In general, the retry interval SHOULD be at
least 30 minutes; however, more sophisticated and variable strategies
will be beneficial when the SMTP client can determine the reason for
non-delivery.
[...]
Experience suggests that failures are typically transient (the target
system or its connection has crashed), favoring a policy of two
connection attempts in the first hour the message is in the queue,
and then backing off to one every two or three hours.
FWIW.
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