It's not configurable on the ppc (basically what hyjkim said) and since the email is coming from the mail2web account, they control the reply-to address. If you have gmail setup on the phone as well, you can reply from there, or it is $4.95/mo for an exchange based account. I use them right now since they are the cheapest exchange/push-mail solution. However, when 1and1 goes to exchange 2007 I am switching, even though they are $6.99/mailbox. HTML email with wm6
