I've noticed on a couple of domains now i've not been getting emails that are generated from scripts running on the server, It seems that the server was locally delivering to the mailbox on itself.
However when the MX entries were entered the box in dns zone editor was unticked so that it would not happen and it *was* working fine up until recently.
In fact in the case of one of the domains all I had to do was open up the DNS zone editor, make no changes and hit Save and it was fixed
Although I'd be interested to know why the system suddenly decided to re-enable that domain for mail
(Didn't affect email originating from outside the server as obviously that would pay attention to the MX)
However when the MX entries were entered the box in dns zone editor was unticked so that it would not happen and it *was* working fine up until recently.
In fact in the case of one of the domains all I had to do was open up the DNS zone editor, make no changes and hit Save and it was fixed
Although I'd be interested to know why the system suddenly decided to re-enable that domain for mail