[Mailman-Users] speed up mailman

[Mark Sapiro]

On 02/28/2016 02:54 PM, Ruben Safir wrote:
> 
> Evidently... So what might be a fix?  Because whatever it is it doesn't affect other mail. :(
> 
> Feb 28 17:17:18 2016 (29233) <CAJS-itcfOi9J2dgX0U_+NR=RkywLeBgvgoE2z67TVL=oF71wUg at mail.gmail.com> smtp to hangout for 10 recips, completed in 69.241 seconds
> Feb 28 17:18:27 2016 (29233) <56D30C67.7070300 at mrbrklyn.com> smtp to hangout for 10 recips, completed in 69.239 seconds
> Feb 28 17:19:37 2016 (29233) <56D311F1.8080002 at mrbrklyn.com> smtp to hangout for 10 recips, completed in 69.240 seconds
...


So it takes Mailman over a minute to deliver to Postfix for 10
recipients. No matter what Mailman is doing, this is way too long by
over a factor of 100.

Various things could be at the root of this, e.g.
reject_unknown_recipient_domain in smtpd_recipient_restrictions
particularly in combination with slow DNS lookups.

To say more, we'd need to see the output from 'postconf -n' and the
contents of mm_cfg.py, but this is really a Postfix tuning issue, soo
see <http://www.postfix.org/TUNING_README.html> and other Postfix
resources as well. There is also information in our wiki, but a lot of
the Mailman specific stuff is out of date, but go to
<http://wiki.list.org/FrontPage> and search titles for "performance".

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan