Looks like BOAC's original glitch is solved now, but to pick up on the mention of AOL a little earlier (because it may help someone else!) ...
'AOL' and 'third-party email' are not phrases that fit comfortably into the same sentence. I dumped AOL a couple of years ago (after being with them since the days of 56K dialup!) after I suddenly found myself completely unable to send. It took an indecently large number of support calls before I found a techie who was prepared to admit that AOL had started blocking Port 25 as an anti-spam measure. The vast majority of their support guys seemed not to even know about the policy.
Unfortunately my domain provider's SMTP server could only accept outgoing email on Port 25 and so AOL and I had to part company. I migrated to fast.co.uk who have been brilliant.
Gadget 