The only options I can think of are :-

Serialize_hosts   (which will limit connections to 1 per host)

Or

You set your system to only queue for certain domains instead of doing
immediate deliveries by using the queue_only control modifier in the ACL's
and then setting you maximum number of queue runners to a reasonable level
(started every minute -q1m to avoid delivery delays)

-Andy-

> -----Original Message-----
> From: Gareth Hastings [mailto:[EMAIL PROTECTED] 
> Sent: 12 April 2006 08:40
> To: alexis; [email protected]
> Subject: RE: [exim] limit SMTP sending connections
> 
> > Hello, can you please, if there is, point me in the way or the 
> > documentation on how to limit the smtp ammounts, in terms of 
> > connections, troughput or any limitation. Fact is one of my 
> servers is 
> > used to send distribution lists to our customers, the server has a 
> > huge bandwidth, so thats not a limitation, but this scenario
> > 
> > - I have, as an example, 3000 subscribers in a list with the same 
> > domain, the receiving server accepts some messages and then 
> it start 
> > to do some tarpitting or applies delay so i get a lot of messages 
> > delayed for a long time.
> 
> I have a similar problem. We forward all our mail to a smart 
> host who does AV scanning and spam filtering. Problem is they 
> only accept 40 concurrent connections and then refuse 
> anymore. If we do any massive mails then we normal hit the 40 
> concurrent connections limit which then causes ALL outbound 
> mail to get instantly deferred!
> 
> 
> 


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