[MM3-users] SMTPNotSupportedError when requesting new password

I get this error when a user tries to use the "forgot password" function in hyperkitty. Obviously the exception is thrown when the send_mail function is called in

/opt/mailman/venv/lib/python3.9/site-packages/allauth/account/adapter.py

In settings.py I have:

EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend' EMAIL_HOST = 'localhost' EMAIL_PORT = 25 EMAIL_HOST_USER = 'valid email' EMAIL_HOST_PASSWORD = 'valid password'

What can I do to debug further?