I have a Nokia 6600 and t-mobile. I had done the same with my SonyEricsson T610 before. If your phone is not capable of reading email, fuhgetabahtit.
I setup another mailbox, specifically for use with my mobile. With both phones, I could setup the phone to read IMAP email, though they both could read POP. It was just like setting-up a mail client. I can check my mail on the Nokia whenever I need. The T610, when it did have reception, would check automagically. I have my MT blog setup to post to the mailbox, and forward other low-traffic sources to that account. I still setup the mailbox on my mail client for cleanup, since mails seem not to delete properly.