Try leaving the port number in the SMTP setting blank.
That is what worked for me.
I tried before ,it’s work but i can’t send email
i get this error when i try send email
SMTPSenderRefused: (553, '5.7.1 Sender address rejected: not owned by auth user.', u'SOUL ERP <firstname.lastname@example.org>')
Did you solve it?
in email account try to check
Always use this email address as sender address