d4rk_ange1 said

Good afternoon! in the water password field from the mail, there is not enough space. The field is designed for 19 characters, I have more than 19 characters. What to do?

What leads you to think it stops at 19 characters? If the box is too narrow, just keep typing and it should scroll.

If the cursor just stops, then there is a serious problem. I have had that with some web forms, but I can't remember seeing it in Thunderbird.

я скопировал и вставил свой пароль, начал удалять по одному символу и получалось 19 всего.