Everyone.net Business Email Solution
Possibly one of the largest group email providers, Everyone.net provides full email access (POP3, Webmail, IMAP) and more than generous storage space (100MB). Their robust administration panel also provides easy access to create and change email addresses.
They are the most expensive provider per email address and there is no discount for purchasing additional mailboxes. They also do not provide a website for the additional cost and the 14 day money back guarantee is about half as long as their competitors.