Problem with adding an email account

I am starting with Em Client, but I really do not understand what is happening. I have added my standard mail account and a gmail account, no problem.

Adding an other IMAP account does not work. The email and password are correct, the configuration of the servers is exact the same as on my tablet and phone (Samsung mail) but it says it cannot reach the server.

When I push the fixation button I can see the program tries different ports, but it fails again. When it is busy trying I can see the command line, strange for me, but I presume correct (See Attachment)

Hope somebody can help me.