kopend - I have the same problem. No send button. Although there is a message with yelow background in the toolbar which says ...This message has not been sent
When you create a new message, select View at the top of the screen, select Toolbars then click on Standard buttons so it is ticked. You should see the toolbar with Send displayed.
Sorry you might be using a different version of Outlook and I do not use it that much. Failing that, try searching in Google.