Changing A record on 1&1 Internet hosted domain
Posted on 2013-11-21
I always understood that in a configuration where email is hosted by an external company and downloaded to an Exchange server using POP, then to open the Exchange server for external Outlook web access, the procedure was to have your hosting company create an additional A record (eg owa.mydomain.com) pointing to the IP address of your Exchange Server, then open your ports 80 / 443 of router, and then to configure IIS appropriately.
In this case, mail is hosted by 1&1 Internet. Their FAQs state:
"If you are using the 1&1 name servers (DNS), you can change the DNS settings (DNS zones, DNS records) such as the A record. The A record is the DNS record that holds which IP address the domain should point to. By default, this will point to the IP address for your 1&1 hosting package however you can always change this so that the domain points to a different IP address."
So in other words you can change the A record via their Control Panel but you can't create an additional A record eg owa.mydomain.com.
I called them up and they told me changing the A record was the correct procedure, but I'm extremely sceptical and feel if I do this my mail will no longer be held on their servers and will stop working. Not comfortable about doing this at all. Other providers' portals let you create as many A records as you like and do not force you to change the primary A record in this way.