Thanks Jimmy, I'll try that also. SAG

Yes clear out the inbox. Another tip is with BMs you regularly chat to, don't start a new message - just hitch on the existing messages. 

Must be some Bastard who continually messages blocking your inbox! 

Very strange, as I do get messages every day, so was unaware of any problem until recently. Anyway, it has now been cleared out so hopefully all sorted. Perhaps the warning needs to be displayed more prominently? S

You've had that issue for a while. I tried to message you about 2 weeks ago and it wouldn't send. That probably wouldn't tally up with it being an issue with existing contacts.