Can SMTP be used over SSL?

SMTP can indeed operate over SSL/TLS, specifically using port 465, which provides a secure channel for email communication. This is important because emails often contain sensitive information, and using SSL/TLS helps ensure that data remains encrypted during transmission, protecting it from interception by malicious actors. SMTP over SSL/TLS allows for secure delivery of email messages, enhancing the security and privacy of email communications.

While some configurations might allow for SMTP to operate securely, the most common and widely accepted method is via port 465. This combination of SMTP and SSL/TLS is an important aspect of modern email systems, ensuring that users can send and receive emails securely over the internet.