3 days now, unable to send mail (incoming is fine).
I have tried deleting and re-installing my mail account several times, numerous re-boots of machine (MacBook) and router. Passwords are reset a couple of times (and are typed in carefully, so are correct)
Can't even send from the bt.com web-based system.
My test mails contain no attachments, no signatures, nothing at all.
Other people with this problem can't seem to find an issue either, rather there is a problem at the BT end, and then "the next morning it all worked fine" answer is given
Now stuck for anything else to do now - can anyone help me?