[Mailman-Users] mailman - sendmail sending queue too long

[Jon Carnes]

This is the one big problem with running a non-optimized MTA and is the
reason I (and so many others) moved over to Postfix.

Try setting SMTP_MAX_RCPTS = 5 in the ~mailman/Mailman/mm_cfg.py file

===
   # Ceiling on the number of recipients that
   # can be specified in a single SMTP
   # transaction.  Set to 0 to submit the
   # entire recipient list in one
   # transaction.  Only used with the SMTPDirect
   # DELIVERY_MODULE.
   # SMTP_MAX_RCPTS = 500
   SMTP_MAX_RCPTS = 5
===

I have advocated this setting for Sendmail folks for a long time now.
Let us know if it works for you!

Jon Carnes

BTW, there is a timing section in your Sendmail.cf file.  You can adjust
the various time-outs used by Sendmail in this section (be sure to
backup your sendmail.cf file first!).  Before I moved my systems over to
Postfix, I used to tweak these settings to get the maximum performance
out of Sendmail.

Here are some settings that might be of interest to you:

  O Timeout.iconnect=5m
  # It waits 5 minutes for the initial connect!!!
  # Definitely change this. Try something like 5 seconds
  # If it fails the initial connect it moves the host to
  # the end of queue, then users the more generic
  # "Timeout.connect" value.
     O Timeout.iconnect=5s

  O Timeout.helo=5m
  # It waits 5 minutes before giving up on a "helo"!!!
  # Even if the host is doing a DNS/RBL look up on you,
  # it shouldn't take 5 minutes (though the RFC calls
  # for 5 minutes here)
  
  O Timeout.mail=10m
  # It waits 10 minutes before giving up on passing off a email!!!
  # The RFC minimum is 5 minutes for this.  I think even that is
  # too long
 
Remember to stop and restart Sendmail if you make a change to
/etc/sendmail.cf (or /etc/mail/sendmail.cf).

Here is a web-page with more info on the Sendmail.cf file:
  http://www.trilug.org/~jonc/mailserver/PartIII.html

I wrote this for a class I teach on setting up Mail-services for 
corporate or personal use. 

======
On Fri, 2003-03-14 at 08:42, Akos Maroy wrote:
> Hi,
> 
> I have the following problem with mailman. I'm administering a list of 
> about 450 subscribers. When there is a new mail to the list, mailman 
> invokes sendmail with very big recipient lists. I can check this by running
> 
> /usr/sbin/sendmail -bp
> 
> occasionally. My problem is, that some of these addresses are 
> problematic (the mail server is not reachable, it's slow, etc.) The 
> effect is, that people on the end of these lists get their mail with a 
> considerable delay, because they have to wait for all the others before 
> them.
> 
> I thought one solution might be to have mailman send out more jobs to 
> sendmail with a smaller recipient lists each. But I didn't find such 
> configuration options.
> 
> Is this possible? Or is there an other solution to this problem?
> 
> Thanks,
> 
> 
> Akos
> 
> 
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