I frequently recommend GMX for free email accounts. It's an extremely user-friendly, and solidly reliable, service.
While I recognise that's not what you're asking for, it does occur to me that 'GMX' is actually '1&1', so if you signed up with them you should get exactly the same standard of reliability.
As long as you don't need more than 2Gb of storage per mailbox (and you can have up to 20 mailboxes) it would only cost you £1.99 per month + VAT (= £2.49 per month):
http://www.1and1.co.uk/email-address#email-tariffs
Domain transfer info here:
http://help.1and1.co.uk/domains-c40986/transfer-domains-c79878/to-1and1-c67763
Telephone support:
(24/7. Exactly the same charges as to 01 or 02 numbers, which means that your call will be free if you've got a landline package that gives you free calls or a mobile deal with 'included minutes'): 0333 336 5691