The E-Mails not send

When I try to send E-Mails, a pop-up appears with a text :
No account is configured. Please create one to be able to send messages
But I have login into my outlook account.
Can you help me please ?

Go to Menu > Accounts and click on the General tab for the outlook account.

Scroll down to Services and tick the AirSync option.

Click on Save & Close.

It works !