Thanks to those who replied. Sorry, I didn't make myself clear. My computer is telling me that the message cannot be sent as the address isn't valid. It's the same address that I've always used and it is in my address book. It is the one shown on the introdutory page of the NOTTSGEN List and I tried it both directly from my address book and manually. I've tried again this evening but nothing works. So I'm mystified. If no one else is having trouble then it must be that my computer has got the hump - or something similar! In which case I shall have to get a man in ... Ruth