[Mailman-Users] scalability + ldap

Brad Knowles brad at shub-internet.org
Wed May 30 02:40:35 CEST 2012

On May 29, 2012, at 5:17 PM, Anil Jangity wrote:

> How does mailman scale to large lists? What about 200,000 members or more? I know a large part of this has to do with the performance of the email infrastructure.

Questions like this are pretty well addressed by the FAQ Wiki.  See <http://wiki.list.org/pages/viewpage.action?pageId=4030518>, <http://wiki.list.org/pages/viewpage.action?pageId=4030582>, and <http://wiki.list.org/pages/viewpage.action?pageId=4030621>.

How far you want to go basically depends on how much work you're willing to put into the Mailman and MTA infrastructure in order to make it happen.

> Are there plans to make use of LDAP for storing Lists information (lists+members+lists configuration)?

You'd need an LDAP member adapter -- basically, an LDAP database interface driver for Python.  There was some experimental work that was done in this area for Mailman 2.1.x, but I don't think it ever got formally included in the code base.  This sort of thing should be relatively easy to do with Mailman 3.x, once that ships and is stable.

> Right now, we have corporate Groups in LDAP, and members in that group (e.g. uniqueMember). When a email is sent to a Group, we have some scripts that will do LDAP lookups and then expand to those specific email addresses and then re-distribute emails to these individuals.
> These are internal Groups. I was debating the plusses and minuses of using a real mailing list (mailman) for this purpose.

There are people who are already doing this sort of thing with Mailman today, but it requires a bit of hacking on the code to put all the pieces together.  We do not (yet) have an out-of-the-box solution in this space, at least not that I know of.

Brad Knowles <brad at shub-internet.org>
LinkedIn Profile: <http://tinyurl.com/y8kpxu>

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