Oops! Has a couple of teething problems thanks to some existing forwarding settings I had in there a couple of months back! It was deleting every email it received as it forwarded to one of the emails it is now supposed to receive!!
All very confusing, and ultimately I am surprised the world didn't implode as a consequence!
Fixed it now and normal email business has resumed...
...thought I better post this before Stu took the mick!