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We do use several RBLs. Does anybody have any recommendations on some good ones to use that they haven't had problems with? We like the SPAM protection that they provide, but obviously we don't want to be affected by their performance issues. Also, is there anyway to test the performance of the various RBLs? Matt -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Salama hussein Sent: Saturday, September 20, 2003 12:03 AM To: [EMAIL PROTECTED] Subject: [VOPmail Beta] SMTP failure * This is the vopmailbeta mailing list * If you use RBLs, check them. If you use quite a few of them and one or more has performance issues, it can slow down your smtp response alot to a degree where it times out. Salama >From: "Robert Sinclair" <[EMAIL PROTECTED]> >Reply-To: [EMAIL PROTECTED] >To: <[EMAIL PROTECTED]> >Subject: [VOPmail Beta] SMTP failure >Date: Thu, 18 Sep 2003 21:04:26 -0700 > >MessageAh, OK, another thing that I have experienced when this happens. > >1. Check the number of current connections, you can use the performance >monitor, but I also use netstat because it shows stagnant connections as >well. If you have a whole lot of connections on the box (my all time >record was nearly 2000) It has been my experience that the smtp service >does not respond. It is most likely due to limited resorces on the TCP IP >protocol because I have plenty of memory and my CPU is ok as well. > >To combat this I wrote a small exe that looks at the netstat and counts >the >number of connections per IP address, then if a threashold is met (I select >3) it puts the IP address in a text file that I merge with the one that VOP >mail uses to block IP addresses. Works great, but I have to run it every 5 >minutes so for 5 minutes they can flood me. It helps with spammers too, >becuase spammers have no regard, they want to blast as much email as >possible, so they will open as many connections as they can. > >2. If there is any slowdown to the SQL server that is servicing the VOP >mail server. This is also been bad for us because I do error logging to the >SQL server, so it can get bogged down. If it gets too bogged down or the >database needs to be rebuilt VOP will sometimes studder waiting for it. > >That's a couple more of my experiences. > > ----- Original Message ----- > From: Matthew J. Schwartz > To: [EMAIL PROTECTED] > Sent: Thursday, September 18, 2003 8:17 PM > Subject: [VOPmail Beta] SMTP failure > > > Grapevine, > > Thanks for the response to Jaeme's posting earlier today. We do >quota >maximum message sizes on all of our accounts, so I don't think we are >getting any really large e-mails going through. > > Just to clarify the problem we are having: > > We are getting numerous complaints that our e-mail users cannot send >outgoing mail and are experiencing timeouts when trying to send. They can >receive mail just fine. We have looked into numerous possibilities each >time this occurs: > > - We checked our overall bandwidth to make sure we weren't max'd and >we >were at about 5% utilization of our bandwidth overall, so that wasn't the >problem. > - We checked the processor and memory utilization on the mail server, >and both of those were barely being utilized. > - We checked incoming and outgoing bandwidth on the mail server itself, >and both of those seemed minimal. > - We checked all VOP related services and all were running. > > Looking at the environment, everything seems to be running fine, yet >everybody receives timeouts when trying to send outgoing mail. Up until >about a week ago, we've been running VOP Mail for a long time without any >problems. > > Rebooting the server resolves the problem for some time and >eventually >it pops back up. Any ideas are greatly appreciated. > > Thanks! > > Sincerely, > Matt Schwartz > > -----Original Message----- > From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Grapevine Staff > Sent: Thursday, September 18, 2003 2:56 PM > To: [EMAIL PROTECTED] > Subject: [VOPmail Beta] SMTP failure > > > I have had this problem in the past with LARGE emails, VOP mail >takes >an email and stores it in memory before writing it to disk (as explained to >me, as I understood it.) > > So when somebody sent a huge attachment, which we didn't have >limits >on then, it would slow down the whole server as it was being delivered. If >it was really large, then NT would go to swap and that was the end of any >response. > > > ----- Original Message ----- > From: Jaeme Adams > To: [EMAIL PROTECTED] > Sent: Thursday, September 18, 2003 12:34 PM > Subject: [VOPmail Beta] SMTP failure > > > I was wondering if anyone else has encountered this before. In >the >last three days our SMTP server has been dieing. After a reboot it works >fine for 4-5 hours and dies again. > > VOP mail 5.1 Win Advanced server > > Thanks > Jaeme _________________________________________________________________ Instant message with integrated webcam using MSN Messenger 6.0. Try it now FREE! http://msnmessenger-download.com ** To leave this list, send an email to [EMAIL PROTECTED] and put the word "LEAVE" in the BODY of the email. ** To leave this list, send an email to [EMAIL PROTECTED] and put the word "LEAVE" in the BODY of the email.
