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. > Then sit back and watch the mail get delivered. > > I don't recall the best way to set up the router entry as it's been > awhile since I tried this. Any tips on this checklist or the correct > router syntax appreciated. -- Christopher Bort Homes Magazine email: <[EMAIL PROTECTED]> website: <http://www.homesmagazine.com/> FAX: 775-284-1298 Phone: 775-284-1294 Real Estate Advertising/ Web Products/ Digital Printing Services Serving: Wine Country Napa & Sonoma County, Marin County, San Francisco Bay Area, Santa Cruz County, Monterey County , San Luis Obispo County & Santa Barbara County, Reno/Sparks & Carson Valley, North Lake Tahoe & Truckee & South Lake Tahoe ############################################################# This message is sent to you because you are subscribed to the mailing list <[email protected]>. 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]>
