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.

... 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.