How to fix “SASL login authentication failed: generic failure”?
In Postfix, the error happens due to wrong configuration of TLS in /etc/postfix/master.cf file.
To ensure that the mail server accepts no mail without TLS encryption, we need to tweak a variable called “smtpd_enforce_tls“.
So to fix the error, our Support Engineers first take a backup of the configuration file. And, then set the value as “smtpd_enforce_tls = yes” in the /etc/postfix/master.cf file.
After the edit, the entries will look like :
# grep 'submission' /etc/postfix/master.cf
192.0.2.2:submission inet n - y - - smtpd -o smtpd_enforce_tls=yes
SWAGGER https://app.swaggerhub.com/apis-docs/Salon-Booking/Mobileapp/1-oas3
Notification Push https://kinsta.com/fr/blog/notifications-push-wordpress/