[Mailman-Users] slow "out" queue

Anil Jangity anilj at me.com
Thu Mar 8 21:59:37 CET 2012

Hi Mark,

Thanks. We're getting better performance now once we added this to our sendmail .mc file:


I wanted to see if we can do further improvements. 
Right now our email flow is like this for lists:

Internet -> ServerA:25 (/etc/aliases mailman) -> ServerA -> SmartHostA

Mailman receives the mail and then posts to the same local MTA on the host which sends it out to Smart host.
I am not sure we can't just have mailman send directly to the smarthost?

What are the implications (on the web site as well as how Mailman functions) if I change DEFAULT_EMAIL_HOST to be SmartHostA?


PS: Now I am getting about 3000 recips in about 5 minutes. Still not the greatest but it's better than before.

On Feb 22, 2012, at 6:53 PM, Mark Sapiro wrote:

> Anil Jangity wrote:
>> This sendmail server is setup to relay the mail to smarthost. When I inject a test mail on port 25 with RCPT and FROM to be a made up junk domain, the email is still delivered *immediately* to the smarthost, there is no resolver issues.
>> If sendmail was really doing DNS lookups, I would think it would be stuck locally or throw a bounce/error right away.
>> It just seems like it's running serially, and not dequeueing multiple messages to the smarthost at a time.
> This issue is not a Mailman issue per se. It is either a Sendmail
> configuration issue or something to do with the interaction of
> Sendmail with the smarthost.
> We have given you all the information we have to help you with this. If
> that isn't sufficient, you'll have to pursue this using Sendmail
> support resources. See
> <http://www.sendmail.com/sm/open_source/support/>.
> -- 
> Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
> San Francisco Bay Area, California    better use your sense - B. Dylan

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