Sending mails sometimes only possible manually

Hey,

I have an issue with eM Client for Android. I am connected to an Exchange server and getting emails works perfectly! When I want to answer or create a new mail, sometimes it won’t instantly send the message. I have to go back to e.g. inbox or sent items etc., then the message “Message was sent.” suddenly appears. The server then is syncing in the background, I can see the icon on top of my mobile phone.
Or if I write a second message, then both messages will be sent instantly.

If I don’t do one of these two steps, the message wouldn’t be sent until I close and open eM Client again (new syncing…).

Does somebody have a clue? Is there an option in the settings that when sending a message the app should always automatically sync (as for getting mails → push!?).

Best,
StormRider

Do you have Undo send feature enabled? Email is actually sent after undo send countdown elapses.

Yes it is enabled. When I disable that feature, it makes no difference I gues…
Any ideas? Btw. the problem is for Android AND iOS.