AKICIF - Windows 8 default account question

Are there any other Windows 8 users on my flist?

I ask because google searching and checking on the Windows help forums hasn't helped, but I don't seem to be able to 'send' emails using my gmail account, which is my default account.

Outlook.com, of course, works perfectly. But I don't want it to work perfectly, I want gmail to work perfectly and outlook to just sit there, being.

Any suggestions gratefully received.