[NTLUG:Discuss] Sendmail slow to respond

[Neil Aggarwal]

Rev wRy:

I have tail -f /var/log/maillog running and all I see are messages like
this:

May 12 13:17:38 www sendmail[3922]: j4CIHcSu003922: [192.168.1.10] did not
issue MAIL/EXPN/VRFY/ETRN during connection to MTA

I have clamav and a custom milter running.  I took them both out
of the .mc file, recompiled the .cf file, and restarted sendmail.
Nothing changed.

I diabled the firewall and nothing changed.

To test the network load, I have disconnected everything
except the Linux box and my laptop that I am using to test.
I don't see a lot of activity on the switch, so I don't think 
it is network load on the internal network.

As far as dns resolution, I did several digs from from the Linux
machine and they come back quickly. I did several nslookups from
my local machine and they come back quickly.

There are no messages sitting in the mail queue.

I can get incoming email just fine.

I disabled the firewall and nothing changed.

Any ideas?

Thanks,
	Neil

--
Neil Aggarwal, JAMM Consulting, (214)986-3533, www.JAMMConsulting.com
FREE! Valuable info on how your business can reduce operating costs by
17% or more in 6 months or less! http://newsletter.JAMMConsulting.com

> -----Original Message-----
> From: discuss-bounces at ntlug.org 
> [mailto:discuss-bounces at ntlug.org] On Behalf Of Rev. wRy
> Sent: Thursday, May 12, 2005 1:15 PM
> To: NTLUG Discussion List
> Subject: Re: [NTLUG:Discuss] Sendmail slow to respond
> 
> 
> On Thu, 2005-05-12 at 12:31, Neil Aggarwal wrote:
> 
> > I believe this is the source of the problem -- Outlook 
> gives up when 
> > waiting for sendmail to respond.
> > 
> > Any ideas what could be happening?
> 
> Watch the log in real time?  What else is installed?  
> SpamAssassin?  How
> much is the network load?  Any other services also slow to 
> respond (like
> ssh)?  How much stuff is sitting in the queue?
> 
> I've experienced similar issues when a particular machine is getting
> swamped with spam and or network scans.
> 
> R
> 
> 
> _______________________________________________
> https://ntlug.org/mailman/listinfo/discuss
>