Why aren't django emails sent from the server?

Question

Django

Good day!
I set up smtp on jang, checked it locally on my computer, everything works, if the password in the mail settings is not correct, it displays an error.
I throw it on the server - nothing works, if the password from the mail in the settings is not correct - it does not display any errors, in principle it does not display any errors, although the letter is not sent. As I understand it, it doesn’t even work at all, since it doesn’t display an error if the mail password is not correctly specified.
With what it can be connected?