Hi I have a macbook pro running Lion. I use the built in Mail app and use Gmail IMAP. The issue I have is that when i send email, it is sent from another email address entirely - which is not even in the settings! Sure I have logged into this other email address from time to time via Chrome or Safari, but its always logged out when i close the browser, and how could that even matter to the mail app anyway?! I really do not get how this is happening, it only started happening a few days ago. Is there some kind of virus for the mac I do not know about? Surely if it was a virus, it would do some kind of viagra email or something pathetic like that. Both are gmail addresses but I have never used this other email address in the mail app before. Anyone else had a similar problem? Cheers EDIT: I have just tried a different email address (in the app) and it does the same thing (not a Gmail one)! I have also just setup my email address in Outlook and it works fine and does not send from this other email address! How weird! So it looks like its a mail app problem. Anyone know how to reset the mail app to defaults? Or can I delete it and go again?