I used the gmail diagnostic download and it told me where the problem was, which is great. I fixed the problem which was with the outgoing mail smtp and the pop3. When I restarted the computer the things I had changed for the good changed back and so it didn't work again. I changed them back and said "apply" and "ok" but the same thing happened when I turned off the computer.

The incoming POP3 setting under "properties" and then "advanced" should be 995, but when I restart the computer it resets to 110 each time.

Under "properties" and "servers" Incoming pop3 should be pop.googlemail.com but it resets to 127.0.01.

Why does it do this? Any thoughts very much appreciated.