lmtpd timeout

[Andrzej Filip]

Gregor Bruhin wrote:
> I just get a lot of sendmail logs:
> timeout waiting for input from [myserverip] during client greeting
> 
> My mails often are delivered, but sometimes a second trial is needed...
> I increased the preforked lmtp daemons on myserver and it seemed to
> help, but could someone tell me a bit more about this, is it tuneable ?
> 
> I have frontend servers with the mtas, and cyrus is running on an other
> server, mails are transmitted via lmtp...
> 
> 
> My sendmail config looks like this:
> 
> #########################################
> ###   Cyrus V2 Mailer specification   ###
> #########################################
> 
> #####  $Id: cyrusv2.m4,v 1.1 2002/06/01 21:14:57 ca Exp $  #####
> 
> Mcyrusv2,       P=[IPC], F=lsDFMnqXzA@/:|m,
>                 S=EnvFromSMTP/HdrFromL, R=EnvToL/HdrToL, E=\r\n,
>                 T=DNS/RFC822/SMTP,
>                 A=TCP [myserverip] 2003
> 

Have you considered making sendmail "chain" deliveries to cyrus via LMTP ?
* multiple messages over single LMTP connection
* a small delay before delivery (<30s for most messages)

[make cyrusv2 "expensive", make it use a separate queue group, use persistent 
queue runners, use MinQueueAge (delay *between* delivery attempts]

It should decrease peak load of cyrus generated by sendmail deliveries.

-- 
Andrzej [pl>en: Andrew] Adam Filip http://www.polbox.com/a/anfi/
anfi at priv.onet.pl anfi at xl.wp.pl [former: anfi at Box43.pl]