eM Client does not send!

Mail
1

I have installed eM Client and it is worthless. It does not send messages, though all the parameters of my account (SMTP, IMAP, password, ports etc.) are filled in correctly and doublechecked. These parameters work perfectly with Thunderbird.
I am wasting my time with this thing.

Apparently I am not the only one with this issue, yet it does not get solved.
If no solution comes up here, I’ll delete this useless program.

2

It depends on what the error is.

Can you give the error others posted if it is the same as yours, or give the error you get when trying to send if it is different?