Here's the situation: We recently purchased and setup 2 new servers, one for DNS and MAIL, the other for hosting. We've replicated the data from the old hosting server to the new hosting server, and started the DNS transfer so it will point to the new DNS server. Both the new DNS server and mail server are in a co-lo facility across town. DNS has not resolved to the server yet. Most mail is going out through the new server. If IMAIL handles mail for the domain, everything works fine. The problem is, mail that relays to an outside server isn't working.
Mail is originating from IP 209.251.142.17 (where the DNS for this site resolved currently), and then tries to send out through the new DNS server (209.208.51.130). For all domains that relay mail to a seperate server, the new DNS/MAIL server reads the A record that IT has for the site (209.208.51.145) and tries to forward the mail there. When SMTP Service is running on the web server, it gets the mail, and has no idea what to do, so it gives me a 550. 1.7.1 and denies relaying. When we have the SMTP Service turned off on the web server, we get "Stack connect fail "209.208.51.145". Contacted ipswitch support, got the following: "When a message comes through IMail destined to a remote domain, IMail sends an MX query to the IP address specified in Domain Name Server address' on the SMTP tab (unless you have send all mail through remote gateway enabled). If it cannot contact the DNS server IP or a network problem prevents accurate communication, it will then pass the domain name to the Windows TCP stack to perform a lookup on the A record for the hostname in question....If the DNS server that IMail should be querying is on the same machine, try using the loopback IP in the DNS field. (There should only be one IP in this field.)" We did this, trying 209.208.51.130, then 127.0.0.1, and neither work. A reminder, DNS and MAIL are on the same machine. It appears that it can't get the MX record correctly, so it's going to the TCP stack. The MX record is setup correctly, and points to the correct offsite server that mail should be relayed to. Any mail that doesn't relay to an outside server is sending/receiving mail correctly, it's just those that relay. Naturally, this includes our client with the largest mail volume. Any support is appreciated. TIA, -Jeff 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/
