I configured a basic Postfix server with basic SMTP and TLS that uses letsencrypt.
The email successfully sends by using this command:
echo "This is the body of the email" | mail -s "This is the subject line" firstname.lastname@example.org
However when I use confirm email address in Preferences of mediawiki it gives this response.
Mailer returned: authentication failure [SMTP: STARTTLS failed (code: 220, response: 2.0.0 Ready to start TLS)]
I already read https://www.mediawiki.org/wiki/Manual:$wgSMTP#Troubleshooting_email and I’m confused because my Certs are already Valid and have not expired. I read somewhere that net_smtp has a bug that prevents usage of TLS. Is this true?
How do I solve this issue?