After changes are made use the test function to ensure that users can reset their passwords.
Email - if not checked all email functions are disabled
Username - leave empty to send mails without login or set a password (MAIL_PASSWORD) in instance/production.py to send mails with authentication
Host - e.g. smtp.example.net
Port - e.g. 587
Email from - displayed in emails
From name - displayed in emails
Recipients feedback - email addresses to receive mails from the feedback form. The first address is also displayed as feedback contact.