Rajkumar S wrote:
Hi,
Does any one seeing increasing smtp concurrency for the past couple of
weeks? I run couple of (qmail/simscan/spamassassin) mail servers and
all experience the same problem. The spam does not increase, but this
is hogging my mail servers. Probably a new crop of spamming tools?
I am attaching one qmail-mtrg graph that shows the problem.
http://img403.imageshack.us/img403/2224/smtpmonthyq4.png
raj
Hi,
Yup, I've seen that across all the mail servers I manage. Seems the
latest crop of Zombies don't disconnect correctly.
For qmail I added the file timeoutsmtpd in /var/qmail/control with a
value of 180 inside it (default is 7200) and it seems to have fixed the
problem without causing any new problems.
Mind you these are external MX servers and there are no dialup users
connecting to them, if there were end users connecting I'd probably
raise that 180 to 300 or maybe even 600.
Regards,
Rick
