Great, thanks for the replies. That about covers it for me. Todd
On 2/7/07 9:45 AM, "Christopher Bort" <[EMAIL PROTECTED]> wrote: > On 02/07/07 at 06:28, Todd Reed wrote: > >> Hi all, >> >> Still running SIMS here despite all rumors to the contrary. >> >> I need to run dual domains on SIMS as the organization is moving to a >> new domain name. We want mail sent to [EMAIL PROTECTED] or >> [EMAIL PROTECTED] to both go to the same user mailbox. >> >> My checklist is as follows: >> >> Turn down TTL's on existing domain. > > Why? If you follow your plan outlined below, the existing MX, > mail.olddomain.com, will continue to point to your mail server without > interruption, no? Whether a sending MTA uses a the old A record from a > cache or gets the new CNAME, it will still resolve to the IP address of > your SIMS machine. Unless you're changing the IP address of your server, > but it doesn't sound like that's the case. > >> Establish new domain with A, and MX records pointing to SIMS. >> >> Give SIMS it's new domain name: mail.newdomain.com >> Set up a routing entry: [EMAIL PROTECTED] > > That should be: > > <[EMAIL PROTECTED]> = [EMAIL PROTECTED] > > However, if all user names are the same for both domains, you can simplify > that to: > > olddomain.com = newdomain.com > > Put this at the top of your router, above any entries that route individual > addresses within the domains. > >> Set up CNAME on old domain name record: >> mail.olddomain.com CNAME mail.newdomain.com >> Remove A record for mail.olddomain.com >> MX record on old domain points to mail.newdomain.com > > That's all optional and entirely up to you. The record for > mail.olddomain.com can remain as an A, especially if you're reasonably > confident that your server will keep the same IP address for a while. > CNAMEs can get messy, so I usually try to avoid them when an A record will > do the job. > > More to the point would be to simply change the MX record for olddomain.com > to point to mail.newdomain.com (an MX does not have to be in the same > domain): > > olddomain.com MX 10 mail.newdomain.com > > Again, you don't need to fiddle with TTLs here because mail.olddomain.com > and mail.newdomain.com will point to the same IP address. If you make > mail.newdomain.com the MX for olddomain.com, then you can remove the > A|CNAME for mail.olddomain.com entirely after its TTL expires. > ############################################################# This message is sent to you because you are subscribed to the mailing list <SIMS@mail.stalker.com>. To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
