Of course, you did mean Outlook to send when you clicked — Send. If your Outlook keeps interpreting the Send button as "send at my earliest convenience (which, chances are, is not now)", you can, fortunately, make it deliver mail you send immediately.
Make Outlook Send Mail Right Away
To make sure Outlook delivers mail immediately after you click Send (provided you are connected):
- Select Tools | Options... from the menu in Outlook.
- Go to the Mail Setup tab.
- Make sure Send immediately when connected in checked.
- Click OK.