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Subject: Re: Tens of thousands of messages stuck in incoming?
From: Wietse Venema (wietseporcupine.org)
Date: Thu Apr 06 2000 - 07:18:44 CDT

Brad Knowles:
> Folks,
>
> I'm wondering if anyone has any ideas why we'd get outbound mail
> relay servers that have tens of thousands of messages stuck in the
> incoming directory, and not being processed by the rest of the system.

It means the delivery side of Postfix is slow or inoperable.

- Deadlock: someone tweaked master.cf and changed the cleanup,
bounce or defer daemon settings.

- Outbound mail is overwhelmed by inbound mail: increase delivery
process limits, reduce inbound process limits.

- Name service problems.

What is the mail being delivered to? If a lot of mail is going to
the same sites (trans-atlantic yahoo, hotmail, aol), then it may
help to enable qmail-ish behavior, by turning off the destination
concurrency limits:

    smtp_destination_concurrency_limit = 0
    initial_destination_concurrency = 100

For more support, need more info. Maybe make a phone call when
I am at work an hour from now.

        Wietse