I should also mention that this test was with DKIM signing and the number of members was between 2100 and 2200.

Terry

On Mon, Jun 18, 2012 at 2:24 PM, Terry Earley <terry@fiteyes.com> wrote:

Our own experience sending to 2100 users is that without personalization a message went out in 2 seconds. When we applied personalization and VERP, that test message went out in 120 seconds, which was acceptable to us.

Obviously, there are many factors affecting speed of delivery. Personalization is just one. What you did was best. that is to test with your own environment.

Terry Earley

FitEyes

On Mon, Jun 18, 2012 at 1:32 PM, Andrew Hodgson <andrew@hodgsonfamily.org>wrote:

...

Hi,

Just wondering how long in the real world it takes to get all messages from a personalised list sent out and processed by the MTA on the same machine as Mailman? List is around 750 members. I did run this once and it took over 10 minutes to get all the messages delivered through the MTA, I am partially wondering whether that is because I am DKIM signing each message? If I use standard delivery the processing time is a lot shorter (around a minute).

Just wondering, Andrew.

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On Jun 18, 2012, at 3:32 PM, Andrew Hodgson wrote:

Thanks, something is wrong with the setup or the VPS I use is not running efficiently. What MTA are you using? I am on Exim4.

Postfix has some out-of-the-box settings that make it particularly well suited for the role of being an MTA for a mailing list manager like Mailman. With work, you can probably get a configuration for Exim that will perform nearly as fast for the same size of list, but Exim is designed primarily for other purposes than maximum performance. As the list grows larger, the performance gap between a well-tuned postfix configuration and a well-tuned Exim configuration is likely to grow.

On the other hand, some people will find it easier to administer the Exim configuration than they would postfix.

If ten minutes to send out your list is actually acceptable for you, then don't worry that someone else can get their entire list sent out in 120 seconds, even if they're the same size and they're doing all the same crypto operations. You need what is good enough for you, and you don't need to be comparing yourself to someone else.

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