It depends on the response of the other mailserver. If imail gets the answer "421 SMTP service not available, closing transmission channel" , it never tries to send the mail to a backup mailserver.
I had the same problem with some domains. All messages sent to these domains bounce back. I talked to one of these domains?s postmaster and he told me that their primary mailserver is only for internal mails, for mails from outside their secondary mailserver is responsible. They were not willing to change their setup. Because this is a important customer of us, we set up an UNIX gateway. Sendmail always tries the secondary MX if the primary is not accepting mail. Heinrich -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of R. Scott Perry Sent: Wednesday, February 27, 2002 2:34 PM To: [EMAIL PROTECTED] Subject: Re: [IMail Forum] Imail do not send mail to backup mailservers >IMail doesn't try secondary mailservers if a mailserver fail. Yes, it does. >One of our customers culd'nt send mails to a email account at the email.dk >domain, but everyone else did'nt have that problem (I could allso do it >through our Exchange server). >I made a nslookup on the domain with the following result: >email.dk MX preference = 10, mail exchanger = www3.cybercity.dk >email.dk MX preference = 100, mail exchanger = mailgate.cybercity.dk > >www3.cybercity.dk internet address = 212.242.40.84 >mailgate.cybercity.dk internet address = 212.242.40.53 >mailgate.cybercity.dk internet address = 212.242.40.52 >mailgate.cybercity.dk internet address = 212.242.40.4 This means that IMail should try 212.242.40.84, and if that fails, it should try *one* of the other three 212.242.40.x's. >Then I tried to telnet to the first mailserver at port 25 but the server >did'nt respond. Then I tried the secondary servers and the responded fine >and I was able to send a mail through telnet. So my conslusion is that IMail >is'nt trying to send mails through a backup mailserver. That's a bad conclusion. The IMail SMTP logs will show you exactly what happened. For example, it is quite likely that the backup mailserver responded with a temporary error. Or perhaps the backup mailserver was down, too, or unreachable. -Scott --- Declude: Anti-virus, Anti-spam and Anti-hijacking solutions for IMail. http://www.declude.com --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ --- [This E-mail scanned for viruses by Declude Virus] --- [This E-mail scanned for viruses by Declude Virus] Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/
