Moved web site NOT qmail to another machine -> 553 sorry, that domain isn't allowed to be relayed thru this MTA without authentication ; no valid cert for gateway #5.7.1

People,

I recently moved philiprhoades.org to another machine (off my own 
machine and onto a VM in the cloud) and changed the Zone Record 
appropriately (the web site is working fine).  However I kept the same 
IP address in the Zone Manager record for mail - but now mails to 
[email protected] are getting this bounce message from the Qmail 
server - philiprhoades.org has been in localhosts from the beginning and 
working fine until this recent change but I can't see why moving the web 
server should matter . . what am I missing?

Thanks,

Phil.
-- 
Philip Rhoades

PO Box 896
Cowra  NSW  2794
Australia
E-mail:  [email protected]