On Mon, Aug 09, 2010 at 04:28:20PM +0100, Martin A. Brooks wrote:
On Mon, August 9, 2010 15:01, Chris G wrote:
I'm not at all convinced that I have the MX record right yet though, nor am I convinced that I actually need that 'mws' CNAME record. Could I just set the MX record to:-
@ 10800 IN MX 10 zbmc.eu.Your MX records should never be a CNAME.
OK, so would the above MX be correct? I.e. I just have:-
@ 10800 IN A 84.45.228.40 @ 10800 IN MX 10 zbmc.eu.
In the zone file for zbmc.eu? (Where 84.45.228.40 is the IP address of my ADSL connection)
... and do I *need* a second MX (backup) record or will the sending SMTP server just back off and try again if my server is down for a short while?
No, you don't.
So just one MX is fine for a simple system with, effectively, only one user at the end. It is pretty reliable and is never turned off except for upgrades and/or disasters.