I have issues all the time with my btinternet email and access, I found changing the password worked but only for a short time then it starts happening again.
Logged in this morning and im getting the old "The TCP/IP connection was unexpectedly terminated by the server", luckily I have my iphone to sort emails out.
When it was a free email it was ok but now its costing a few quid a year it needs sorting out.....