MX record question
Posted on 2011-02-11
If I were to add the following records to my domain host, what would happen if one host (18.104.22.168 for example) was down?
MX @ mail.mydomain.com
A mail 22.214.171.124
A mail 126.96.36.199
I want to setup our only mail server so that if our ISP goes down (which it has 2 times this week), that I can move the cable over to our other ISP and mail will continue flowing by switching from the 188.8.131.52 WAN IP to the 184.108.40.206 WAN IP.
If I do it this way, would this cause intermittent problems where it does a round-robin and the mail server answers incoming 50% of the time, or will it work like having 2 MX records and just jump to the next one if the first one doesn't answer?
Right now, I have it setup as the following which is working fine. The annoying thing is that people have to access OWA now as mail2, which we would rather have both working as just mail.
MX @ mail.mydomain.com pref 10
MX @ mail2.mydomain.com pref 20
A mail 220.127.116.11
A mail2 18.104.22.168