UPDATE: Just went to my emails' web-based interface and ALL the missing emails were sitting in a Spam Folder !!
No idea why or how that got invoked because (1) it never happened before, and (2) I never created the Spam Folder. In fact there is no provision to to stipulate what is and what isn't spam, so maybe ClearNet/Vodafone recently set up an automated Spam-catch service?
Certainly didn't get any notification of such.
Amyway, I have deleted the Spam Folder and hopefully it won't re-create itself.
Mauricio - if you would please be good enough to PM me another test message in the morning that would be appreciated.