Re: [cobalt-developers] Raq4 Mail server connection issue

[Gerald Waugh <gwaugh@xxxxxxxxxxxxxxxxxxxxxxx>]

On Wednesday 20 November 2002 21:02, Skyhound Internet wrote:
> My Raq4 has sites and mail hosting on it.  For a year and a half connecting
> to the mail server for the individual domains was done rather quickly. It
> would connect in a second or two.
>
> Lately, a few of the domains can take up to 30 seconds or longer trying to
> connect to the email server to send mail out.  The mail program simply says
> "Connecting to mail server"...
>
> I've think I've eliminated a DNS issue by using the IP address as incoming
> and outgoing servers with the same problem occurring.
>
> It seems to happen more with attached files being sent, which obviously
> takes longer to send but shouldn't to just connect. Again, this problem
> just started happening after over a year and a half.
>
> Other clients have complained as well which pretty much eliminates local
> connection problems and web access to the sites during this problem remains
> very fast.
>
> Does anyone have any ideas as to what this issue could be or where to
> start?

It sounds like a reverse look-up issue!
sendmail will try to do a gethostbyaddr()
which can take 25 seconds / try....
The insane thing is that after a failure, it will log it, and then go ahead 
and perform it's function.
IIRC there is a way to defeat the lookup, but I try to fix things! Check the 
ip addresses that have the long delay for proper reverse functionality....
dig -x ip.ad.re.ss

If their reverse doesn't work, you or the client must tell their ISP to fix 
it!

Gerald
-- 
http://frontstreetnetworks.com         http://raqware.com
Front Street Networks LLC   |  Phone: 203-785-0699
229 Front Street, Ste C, New Haven, CT 06513-3203