Cryptography - SMTPedia

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Cryptography

RFCs

RFC 5246: TLS Protocol Version 1.2

Alaa 16 July 2026

Defined TLS 1.2. Obsoleted by RFC 8446 (TLS 1.3). Still widely deployed but being phased out.

RFCs

RFC 8446: TLS Protocol Version 1.3

Alaa 22 July 2026

The current TLS standard. Mandatory reading for secure SMTP (STARTTLS/SMTPS) and IMAP/POP3 over TLS.