A better way (in my opinion) to manage mail on the Moment is to use the method I am using....running everything through my gmail account and gmail app.
I am running 2 gmail account, 2 yahoo accounts, and one ISP account.
The Moment's main Gmail account imports the other 4 email addresses and then labels them. Once synced into the Moment's gmail app, the labels are there and I can effectively manage all 5 email accounts in one app as each email has a little blue label letting me know which account it is from.
If I respond to a message, it automatically sends it as though it originated from that email account. example, I get an email on the gmail app that came from one of my yahoo accounts (labeled in gmail as: Yahoo:xxxxx with xxxxx being the yahoo username). If I reply to this message, the email will be sent with the YAHOO accounts info (the from line will contain
XXXXX@yahoo.com). This all takes place from the Gmail app.
Check the sticky HOW TO section from this forum's main screen. I think it is one of the first items on the first page