Simon J Mudd [mailto:simon.mudd@alltrading.com] writes:
> rtg@mich.com (Rick Green) writes:
>
> > Majordomo is currently running lists with many thousands
> of subscribers.
> > In it's vanilla form (1.94.4), it can be slow to send out
> all that mail
> > serially. More a sendmail issue than majordomo's. With
> the addition of
> > bulk-mailer, some advantage of parallelization is achieved on larger
> > lists. I've heard that qmail can also do this, and that
> the features of
> > bulk-mailer are built-in to the development (mj2) version.
> I believe postfix is being used on some large mailing list (freebsd
> use it I think) and have similar performance to qmail. The advantage
> is that the postfix interface to majordomo is identical to sendmail
> which makes the migration easier I think.
i am using exim (http://www.exim.org) to handle very large mailing lists
with majordomo 1.94.4, with generally excellent results on lists with
thousands of members. i'm doing this with an AMD K6-166 running Linux,
and the box moves the mail most excellently and generally loafs along at
1-5% cpu utilization with load averages below 2. it is also serving
quite a lot of web pages.
the key seems to be to set exim's remote_max_parallel up high (i have it
set to 40) and put in lots of RAM (mine has 128M) so the box isn't
paging. there are some other parameters for exim that will make large
majordomo mailing lists work better, which i can dig out of my exim
config and share with interested parties.
exim also allows for a fairly easy way of locking down the -outgoing
addresses, which you may need to fight against spammers and other mail
abusers.
richard
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