Hi,

I have the following situation on a mail server that has been running
without errors for about 2 years.
The issues have started within the last couple of weeks.
1. Clients are unable to send mail after a short period of time.
2. If I do a qmailctl stop | start the mail goes out nicely for about 10
messages or less.
3. After a few messages the server becomes slower and slower.

I have checked the following:
1. I do have spam assassin installed, however have taken it out of the
supervise scripts and noticed the same issue.
2. I have verified DNS settings and everything looks good. (I am running
djbdns.)
3. Memory usage looks ok.
4. Currently the mail logs (both qmail and system) look good and do show
that traffic is passing through, it is just extremely slow.
5. Regular network traffic is good. I can easily copy my fairly large
(~100MB) backup files off of the server in less than a minute.

The hardware is an E1000 NIC, dual processor, SCSI hard drive with a Debian
sarge set up.
I have not ran any updates or installed any upgrades on this system.
(Basically it was working so I didn't do anything to it.)

>From what I have found on google and in the forums there seems to be a
consensus that the issue with this would lie in either dns or qmail-smptd.
I have followed all of the checks I can find, however so far no luck. I
double checked lwq sections G.9 and G.10 however everything there looks ok
as well. I have tried replacing the -l localhost option for tcpserver in my
run script with the address of both my server and my ISP's dns server and
mail does not get delivered at all.

Anybody have any other ideas out there?


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