Challenges with Email Clients (Examples)
Clients Don’t always articulate if they support STARTTLS or just IMPLICITLY SECURE connections.
Confusing Example: PHPMAILER:
Opportunistic Encryption - what is it?
Confusing Example: ZOHO Mail
What they mean is STARTTLS however as most people use TLS and SSL the same way I can see how people get confused
Good Example: Python SMTPLIB:
How to use STARTTLS and which methods don’t support is clearly outlined
https://docs.python.org/3/library/smtplib.html
Good Example: GMAIL
STARTTLS is clearly Identified.
