Using mail app from 2 different addresses

Are you talking about from the standard iphone email interface?

 

Choose the account you want under "Accounts" if it's a downloadable outbox it'll show it there. You're just getting the inboxes I bet.

 

Tap the plus button.

edt: actually - that's rubbish. Just tap on the bit that says 'From:' then tap the current 'from' address.

 

Just to clarify... you'll be able to change your FROM e-mail address only when you have multiple mailboxes configured on your iPhone. It doesn't inherit the fact that your GMail controls your school account. So for instance, all the e-mail accounts I have set up on my iPhone are available as FROM's for me, but I do have an alumni account, which is just a forwarder e-mail address, which is registered in GMail (so I can send messages from it via GMail and I receive the e-mail from it forwarded into my GMail inbox), and I can't set that up as a from address, at least in my non-jailbreak iPhone.

 

Actually, there is this trick:

http://email.about.com/od/iphonemai...rom_Addresses_with_an_iPhone_Mail_Account.htm

I'm not sure if it still works....

 

Cool! I'm sorry I didn't mention it right away. I forgot about it, it's been so long since anyone mentioned it. Good to know it still works.