He means that the disk could be overloaded. We occasionally see this problem ourselves on our busier servers - we will receive a burst of email at once (200-300 messages) and the SMTP servers will actually become non-responsive for a few minutes. When this happens, telnet to port 25 fails, but CPU usage is usually pretty high and I also see a large number of SMTP processes. This last bit seems to be different than the problem you are having.
In any event, you can check your disk usage by going to the Performance admin tool and monitoring % Disk Time and Current Disk Queue Length. Ideally, your current disk queue length will be 0, which means zero tasks will be queued for processing by the disks. The higher this number is, the more likely the problem is disk related. -Jay -----Original Message----- From: Mr Gregory DeClue [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2003 9:47 AM To: [EMAIL PROTECTED] Subject: Re: [IMail Forum] Continued SMTP Issues What do you mean the disk is really the problem? This is a brand new hard drive that has been installed and running fine for a month, with no changes to the system once 8.01 was installed. I am unable to telnet to the server on port 25 remotely or setting in front of it and doing a telnet localhost 25 or telnet 127.0.0.1 25. The smtpd service never stopes running if I look at task manager during this time all of the imail services I run are still running and nothing is using 100% of the cpu or enormous amounts of memory. The smtp setting I am using is relay for addresses with only my ip addresses listed. As I said this server has been running for a month without a problem, the only changes I have done are implement the spam processing and myself and ipswitch have looked thru the log files trying to find any potential problems but are unable to...the log is still showing rdeliver and ldeliver but I am unable to access the smtp port. Thanks Greg --- Len Conrad <[EMAIL PROTECTED]> wrote: > > >Active Connections > > > > Proto Local Address Foreign Address > >State > > TCP 0.0.0.0:25 0.0.0.0:0 > >LISTENING > > in the above case, also telnet to that ip port 25 > and see if Imail picks up > the phone, or timeout, or connection refused. > > >So I am assuming what you had said about showing > >possible SMTP/SMTPD thread saturation, meaning no > more > > > >listening > >(SMTPD) or delivery (SMTP) threads available is > what > >is occuring. What can I do to correct this? > > If the SMTPD is really overwhelmed with "too many" > simultaneous connections > ( I can produce this at will with IMGate as the MX), > then the problem may > be that SMTPD is having trouble dumpting the inbound > msgs on the queue, the > disk is really the problem, not STMPD. > > > I am > >using a good kill file, I have all of the spam > filters > >correct, I have relay for local addresses enabled > > ip addresses, not email addresses, right? > > it doesn't take much CPU occupation to saturate the > disk access, so when > the state occurs, does task manager show a lot of > disk i/o? > > Len > > > > _____________________________________________________________________ > http://MenAndMice.com/DNS-training: London; Chicago; > San Jose; Wash DC > IMGate.MEIway.com: anti-spam gateway, effective on > 1000's of sites, free > > > To Unsubscribe: > http://www.ipswitch.com/support/mailing-lists.html > List Archive: > http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
