If all you're doing is changing a server's IP address, I would do the following:
o Have a backup MX server configured (that won't be moving during this process). o 2 days before the migration, lower the TTL setting for the domains that are moving in the DNS records. Appropriate value would be 60 seconds. o Migrate the IP, update DNS, tweak any XMail settings, bring up the new server o 1 minute later, 90% of all hosts will see the new IP, the rest will be contacting the backup MX server for inbound emails. o You can expect all servers to stop caching the old IP in a matter of minutes. o Once everything is ok, increase the DNS TTL settings back to the original levels for the domains. I've migrated 5 domains from another ISP using the above with no impact. -Don -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Sönke Ruempler Sent: Tuesday, March 05, 2002 12:39 PM To: [EMAIL PROTECTED] Subject: [xmail] Re: custom domains > yes, don't say real domains have higher priority than custom domains in > lookup :-). oh yes it is, i just tested it if blah.com does NOT exist as real-domain. maybe you wonder why i want to use both custdomains and realdomains: We are switching our email server to another subnet. and because it lasts some time until all customers/dns have the new dns entry, we want to provide our customers the way to still send email over the old mail server (and for that case i left the realdomains in the old mail server for smtp auth). but incoming mails should be redirected to the new server, so i want to setup a custdomain file for each domain. but that fails because xmail looks up first in real domains :-( do you have a solution? - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
