[Mailman-Developers] Re: Slow Performance on semi-large lists

[Chuq Von Rospach]

At 12:10 PM -0800 12/14/00, Michael Yount wrote:
>I made the same recommendation a few months ago. Later
>scrutiny of how defer mode works (with 8.9.3, IIRC) uncovered that using
>it caused relaying checks to be bypassed entirely.

Oh, grumble.

>If so, it is probably wise for administrators who, like me, have a
>modest understanding of sendmail to use defer mode only on a restricted
>interface.

what that means for Mailman is you can't tweak the sendmail.cf, and 
therefore can't use DELIVERY_MODULE = SMTPDirect. You'd have to 
instead use the Sendmail DELIVERY_MODULE (which I haven't tested, and 
which doesn't (sigh) use MAX_RCPTS. And you could add the -odd to 
SENDMAIL_CMD in the mm_cfg file to get this. But it changes other 
stuff, so...

Oh, grumble. It works if you spin the dead chicken three times while 
wearing teal socks, but not if you spin it counterclockwise in red 
socks, during a full moon..

Thanks for the heads-up, Michael.

Another option, I guess, is to run two sendmails on two ports, a 
public one using mode=queue on 25, and a second one on some other 
port mode=defer, but that's at best security by obscurity. Ah, the 
joys of sendmail...

(postfix fans can step in and start giggling any time they want...)
-- 
Chuq Von Rospach - Plaidworks Consulting (mailto:chuqui@plaidworks.com)
Apple Mail List Gnome (mailto:chuq@apple.com)

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