MT4 email issues

For some reason I can't get MT4 to send emails. I has been working for weeks. I didnt make any changes. In the journal it prompts me to go to this link.
Should I reinstall?

http://pobox.com/~djb/docs/smtplf.html

I was having the same problem. I signed up at bluebottle.com and it works like a Champ (Baily).

Thanks Summitfx,
I was already signed up with Blue Bottle. I changed my STMP settings to them and it worked.

Were you with Yahoo before as well?

No Gmail- Glad it worked out for you

Did this problem start with the lattest build of MT4 that I think came through on the weekend??

(I've still been saying no to upgrades! )