Re: [IMail Forum] stack connect fail tracing

[Imail Admin]

Title: Message

I check both the IMail Knowledgebase and the Forum Archives.  I read a lot, but found little resolution.  What I know is that this is supposed to be a problem with the system being unable to resolve the correct IP address for a recipient mail server.  However, our system, including the DNS server and settings, have worked fine for ages, and nothing has changed.   One thing I noticed in the logs was that when IMail can't resovle an address, it follows a procedure: first by Hosts and MX, then by Stack.  What exactly does "Stack" mean?   Thanks,   Ben   ----- Original Message ----- From: SSS Tech To: IMail_Forum@list.ipswitch.com Sent: Wednesday, June 08, 2005 6:54 PM Subject: RE: [IMail Forum] stack connect fail tracing Hi Ben, check the archives and Imail support for Stack Connect Fail and you should find some stuff. I had this issue back in version 7.X when I started out with Imail. I was using my ISPs DNS (external) and was getting a bunch of these. I moved to an internal DNS server and things got better. I eventually setup DNS on the same box as Imail (Win2K Server) and as I upgraded through the versions it seemed to get better and better. Maybe the upgrades have nothing to do with it but now I rarely have any and I am pushing even more mail through the box. I only keep one DNS server listed in Imail. Hope that helps.     Tyler -----Original Message----- From: Imail Admin [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 08, 2005 9:12 PM To: IMail_Forum@list.ipswitch.com Subject: Fw: [IMail Forum] stack connect fail tracing Strangely, I'm not sure this message got through, precisely because of the problem it describes.  So I'll repeat it and watch for it.  Sorry if you see this twice.   Ben   ----- Original Message ----- From: Imail Admin To: IMail_Forum@list.ipswitch.com Sent: Tuesday, June 07, 2005 6:01 PM Subject: [IMail Forum] stack connect fail tracing Hi,   We had a problem with the "stack connect fail" error recently.  This is, according to the archives, related to being unable to resolve the domain name for SMTP delivery of messages.  Our IMail server (running 7.15) uses our own DNS server as its primary server.  It also has listed a secondary DNS server (these are listed by IP address in the services/SMTP tab) for an upstream ISP.  I'm trying to track down why this problem is occuring, or the extent to which it is "normal".   I rebooted our DNS server, even though the event log showed no problems, and I added some new (and hopefully more responsive) additional DNS servers to the IMail/SMTP setting.  The number of connect fails has gone down from every few minutes (as it was yesterday) to once every twenty minutes or so.  My questions are:   1. Is this a reasonable number?  2. How do I trace where the IP resolution fails? 3. Does IMail use all of the DNS servers for which it is configured, or only some?   Any advice would be helpful.  We've been thinking about replacing our DNS server, but we're a pretty small operation and I'm not sure that that server is really all that busy.   Thanks,   Ben Bednarz BC Web