^^^ Thanks forn the info, "nice" to read it's not an isolated case here.
Can only say, of all the troubles the forum is- has been- can be- subjected to, like tech, offlines, hackers, spammers, members fighting or whatever, the most troublesome pain over the years has been dealing with the major nuisance created by @btinternet, as many in UK uses it, and the trouble rains down on me to sort things out.
Had to implement a @btinternet is banned warning in big bold letters in the registration agreement. Anyone using it will (can) not be accepted. Same for @bigpond, @aol, but minor problems with them compared to bt.