[Mimedefang] OT: sendmail limit connections

Matthew S. Cramer mscramer at armstrong.com
Fri Feb 25 15:24:20 EST 2005

On Wed, Feb 23, 2005 at 05:31:45PM -0600, -ray wrote:

> I've heard good stuff about greet_pause and plan to use it as soon as i 
> get to 8.13.x.  What delay do you all typically use to weed out zombies 
> but respect legit servers?  Can you disable greet_pause for the local 
> network?

As a baseline, we get about 2Mill email attempts per month.

I implemented months ago and slowly increased the pause up to
1250 ms.  I wanted to avoid any false positives (I have had none) and
found that any further increase in the pause doesn't substantially
increase the amount of rejections.

We hit about 125,000-150,000 rejections due to the pause, per month.

It can be controlled in the access DB as such:

GreetPause:    0
GreetPause:10   0

The above two lines provide no pause for localhost or anything on 10/8.


Matthew S. Cramer <mscramer at armstrong.com>          Office: 717-396-5032
Infrastructure Security Analyst                     Fax:    717-396-5590
Armstrong World Industries, Inc.                    Cell:   717-917-7099

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