Re: Intentionally slow down queue connections?

Ken Williams <kenw232@xxxxxxxxx> writes:

I'm running sendmail 8.14.1 on linux 2.4. I have a lot of queued
items (say 7000) all going to the same domain (samedomain.com). When
sendmail tries to run the queue (every 15 minutes or whatever), it
quickly (very quickly) spawns the processes and ties to connect to the
domain to deliver the messages as expected.

The problem is because the connection to this server is so fast theres
no delay anywhere, it rips through like a 100 per second, so of course
the receiving domain (samedomain.com) will throttle it (Connection
rate limit exceeded).

This actually makes it impossible to deliver these messages
normally. Only like 3 messages per 15 minutes actually get delivered
because the connection rate is exceeded for the rest, stopping them.
How can I fix this? I'm sure if I could tell sendmail to simply pause
for a second between each message attempt the connection rate would be
fine and it would (more slowly) go through each message in the queue
delivering just fine.

Any ideas? What am I doing wrong?
kenw232@xxxxxxxxx
[...]

1) Avoid "at once" delivery attempts - default sendmail's delivery mode
It requires new smtp mailer with expensive flag (F=e) and
FEATURE(`mailertable')
2) Create separate queue group for deliveries to the domain

It will make sendmail send more messages over single smtp connection
[ all configured via sendmail.mc/sendmail.cf ]

Do you want more detailed description?

--
[pl>en: Andrew] Andrzej Adam Filip : anfi@xxxxxxxxxxxx : anfi@xxxxxxxx
Open-Sendmail: http://open-sendmail.sourceforge.net/
God help the troubadour who tries to be a star. The more that you try
to find success, the more that you will fail.
-- Phil Ochs, on the Second System Effect
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