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This is what I did when I had 1&1. I setup a google apps account using my domain and then used gmail for my emails. It was really easy to do and didn't cost me anything.

WOAH ! Just had a look at doing this looks google apps account looks majorly complicated and way over my head. I fear i will screw my email up completely.

I am a total novice and dont even know what a subdomain is ?? I just wanted to be able to send and receive my emails through my phone. Phone manual makes out you just fill in a few details and hey presto all done.
When i tried to register google apps account what it wanted me to do to verify i own the domain was way beyond me. I didnt have a clue what they were asking me to do.
A mate set it up for me ages ago cause i needed an email i could access from any computer as no home pc for a period.
Probably dont need it if thats what your getting at. But had it ages now and want to keep same email address.
I'll just not bother trying to link it to my phone if that complicated i guess