What DNS software are you running? We run Bind for NT internally and were having somewhat the same issue. Certain domains would work for awhile and then stop resolving. Clear the cache, reboot the dns, or switch to secondary would clear the issue temporarily fix the issue.
Ended up grabbing the newest stable build of it and it been running clean for about 5 months (with no resets) ----- Original Message ----- From: "Glenn Bullion" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, August 10, 2004 8:53 AM Subject: RE: [IMail Forum] DNS issue or iMail issue > I'm not sure what the problem is either, but I'll get this as well on > particular domains. > > Things I've done to fix (not sure what the exact solution is, but this seems > to work for me): > > 1. I have 2 internal network DNS servers. Sometimes if I just switch to my > backup (inside of Imail), it will find the host. > > 2. I clear my DNS cache inside of Imail. > > 3. Restart SMTP, Queue Manager, and DNS service. > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Scott Coleman > Sent: Tuesday, August 10, 2004 9:46 AM > To: [EMAIL PROTECTED] > Subject: [IMail Forum] DNS issue or iMail issue > > > Occasionally I am getting an unknown host error. I have noticed it with mail > to thecolemans.net and yesterday to msu.edu. I have only seen the issue with > thecolemans.net from mail coming from my iMail server. I am not sure if this > is an iMail issue or DNS issue. > > Any suggestions on troubleshooting it. It doesn't happen all the time. It > seems to be intermittent. > > Scott W. Coleman > Network Administrator > Kramer Triad Management Group > (734) 973-5500 Phone (734) 973-0001 Fax (734) 531-2101 Direct > > (888) 206-0368 Toll 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/ > --- > [This E-mail scanned for viruses by Declude Virus] > > > --- > [This E-mail scanned for viruses by Declude Virus] > > > 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/ > > *Scanned for viruses by Declude Virus* > > *Scanned for viruses by Declude Virus* 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/
