Internet Explorer is not supported. Please upgrade to a more modern browser.
i need help with php mailer, ERROR: uknown
SMTP ERROR: Could not authenticate.
Please edit the file core/classes/Email.php in a text editor. Delete all code inside, and replace with this new code: https://gist.githubusercontent.com/samerton/a26df55561f9735eb2f69af6868f57fb/raw/39600339f889e35546daa8a7f9b89788cfa73261/Email.php
Then send a test email in the StaffCP -> Configuration -> Emails tab, and a full debug log will appear on screen with more information.