Where can i find outgoing messages?

I have problems with an outgoing message. The software informs me that there are one or more messages in the outgoing mail to be sent. But I do not see any message and, above all, I can not access the outgoing mail folder.

How can I stop this action and close eM Client correctly?

it depends on how your account is setup. Sometimes the Outbox is in local folders, sometimes like Exchange it is in the account folders.

If you are not using Exchange, and can’t see the local folders, you can enable them in Menu > Tools > Settings > General > Show local folders.

Check if your messages are there.

Wonderful! problem solved! You were very kind, thank you!

Outbox can be seen by right click on All Inboxes-> Display-> Outbox