The mailing list for listmasters using Sympa

[Rene Pfeiffer <address@concealed>]

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On Apr 01, 2002 at 1615 +0200, Valics Lehel appeared and said:
> 
> I have the following scenario.
> A list with 3000 subscriber (newsletter setting)
> 
> sympa.conf
> ## Maximum number of recipients per call to Sendmail
> nrcpt           25

You should raise this to 100 or 200. Make sure that you set this value
to the same or a higher value in your Sendmail configuration. The
relevant setting is 

define(`confMAX_RCPTS_PER_MESSAGE',100)

in the sendmail.mc file. You should also consider increasing the other
configuration defaults.

> When I send a mail to this list I get a huge "mailq" and seems that the
> messages is not delivered in an hour. [...]

Do you have an IDENTD daemon on your box? If not does your mail server
answer TCP connection requests to port 113 with a TCP Reset? How does
your mail server resolve DNS queries? Do you have a local cache?

> ps -ax|grep sendmail
> 15827 ?        S      0:25 sendmail: rejecting connections on daemon MTA:

There is something missing. What do the logs say? It is possible that
your Sendmail has too low load configurations. You can set this in the
sendmail.mc, too.

define(`confQUEUE_LA',12)
define(`confREFUSE_LA',18)

QUEUE_LA is the load average threshold for queuing. If the system load
is higher than 12 Sendmail will queue and not deliver mail anymore. The
REFUSE_LA is the threshold for refusing mail. You should check this on
your system.

There are further Sendmail configuration parameters that you can use,
for example the maximum amount of Sendmail daemons running:

define(`confMAX_DAEMON_CHILDREN',64)

There are some documents about tricks on getting Sendmail to perform
better:

http://www.sendmail.org/~ca/email/doc8.9/op-sh-4.html
http://www.shub-internet.org/brad/papers/sendmail-tuning/
http://linuxperf.nl.linux.org/mailserving/

Best regards,
René

- -- 
 GNU/Linux Manages! - Linux Solution Provider
  RP551296-NICAT    - Free Software for Open Minds

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