From: Wietse Venema (wietseporcupine.org)
Date: Thu Oct 02 2008 - 12:45:51 CDT

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Steve Lindemann:
> My problem is that I support a number of email lists (using mailman),
> none are particularly big or busy and, until recently, have been
> chugging merrily along without a problem. However, a number of domains
> we deliver to have suddenly started complaining and my outbound queue is
> filling up with:
>
> refused to talk to me: 421 Too many concurrent SMTP connections

Adjust smtp_destination_concurrency_limit in main.cf, or configure
an additional clone of the smtp client in master.cf. Let's assume
that you give it the name "mumble". You would then specify a lower
mumble_destination_concurrency_limit in main.cf.

> 452 Too many recipients received this hour (in reply to RCPT TO command)

Same deal: either adjust smtp_destination_rate_delay in main.cf,
or make a mumble clone of the smtp client in master.cf, and specify
a low mumble_destination_rate_delay in main.cf.

Postfix by default sends no more than 50 recipients per MAIL FROM
transaction; there is no lomit on the number of deliveries per SMTP
session.

        Wietse

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]