Thanks for the links, but I already read the wiki before posting.
I have done some more digging... and have probably solved this mystery behaviour myself.
I just stumbled across some ´Notifications´in my User Control Panel, and, yes, they are Membership Applications!
I have never seen/used Notifications before, but in
Code: Select all
Board Preferences >Edit Notification Options
I found that new member applications were only set to open as Notifications and NOT be sent as emails. I have now checked the email option box as well so hope all will return to normal.
I have also Forced Re-activation of a few genuine new users. Strangely, not many spam user applications to delete this month. Anyway, thanks for the help.