If I understand your question right, you want to put up: 192.168.1.1 mail.yourdomain.com where the address is your Fiber 10.55.1.1 mail.yourdomain.com where the address is your cable modem.
No, there is no problem doing that. The only issue you might have is with some folks check the A record on your HELO. Exchange will allow you to easily change the HELO so I would put up to A records. Fiber.yourdomain.com A 192.168.1.1 Cable.yourdomain.com A 10.55.1.1 And just hit the fqdn option on the sending exchange server and change it to match the current in use setup. From: [email protected] [mailto:[email protected]] On Behalf Of J- P Sent: Friday, September 18, 2015 10:31 AM To: [email protected] Subject: [NTSysADM] secondary/temporary rdns Hi all, a site is having issues witht the fiber and wants to use the cable till its resolved. The issue is that rdns for exchange points to the fiber IP, is it possible or recommend or not recommended to have rdns for one domain point to different ip's?
