Sending mail from Mac through Gmail IMAP

Hello,

I have question with regards the IMAP gmail account I have set up on my mac. When sending a mail from my mac and syncing afterwards I do not see the sent mail in my gmail account. It seems like it has only sent from my local mac.

Do I have to position myself to any particular folder first before I create a new message?

Sending mail from my online gmail gets into my mac, the other way around I'm having troubles.

Anybody can help me?

rgds
Tom