Hey all,
I use three active mailaccounts :
Since yesterday I can’t send mails via Outlook, because Outlook is gone at the point “send as” :
The other two accounts are still in place. Only Outlook is gone. I still deleted the account and renewed it. And I switched back to a former backup. Still the account is gone. In Vivaldi (for example) there’s no problem …
Does anyone have an idea?
Thanks in advance!
Go to Menu > Accounts and click on the General tab for that outlook account. Scroll down to Services, tick the AirSync service and click on Save & Close.
My hero 
That did it, thanks a lot!
What’s the explanation for that?
My other accounts don’t have “air sync”
No, it is particular to Microsoft accounts. There is an explanation as to why we recently changed to this method for sending here: Workaround for the sending issue via SMTP for Microsoft Outlook.com accounts | eM Client
Ah okay, I read that before - but didn’t mention that this problem will hide the “send” - option.
Anyways, thanks a lot for your help!