POP3S
POP3S (Post Office Protocol version 3 over SSL/TLS) is a secure email retrieval protocol that encrypts the connection between an email client and server using SSL/TLS. It is an extension of the standard POP3 protocol, adding a layer of security to protect sensitive data like login credentials and email content during transmission. POP3S typically operates on port 995, providing a secure alternative to the unencrypted POP3 on port 110.
Developers should learn and use POP3S when building or configuring email clients that need to securely retrieve emails from servers, especially in environments where data privacy and security are critical, such as in corporate or financial applications. It is essential for preventing eavesdropping and man-in-the-middle attacks during email retrieval, making it a standard choice for modern email systems that require encryption.