Apple Mail 4.5 won't "Send"
After many years of good service my Apple Mail has suddenly become very picky. For a week or two new messages have been dispatched to my outbox to "try later" thence to "whoosh" away when it felt like it. Lately it has become downright nasty, refusing to "send" at all. Connection check tells me "cannot connect to SMTP". A call to my ISP verified all settings were correct. Tried changing password -nothing worked. ISP tells me fault is with Apple Mail. Incoming mail is O.K.
Has anyone faced - and solved - this problem? Will re-installing Mail be the way to go?
Any comments much appreciated.
iMac