Gmail's handling of multiple accounts is just about the poorest I've seen in any email client. Even Microsoft Outlook handles multiple accounts better!
On Oct 99, 2012, at 3:33 PM, KrakensDen yawped:
The real annoyance is Outlook. If someone responds to that email via Outlook/Exchange, the reply will be sent `To:` your main email address rather than to the address you sent with.