Sophos Firewall scans encrypted Email traffic over Transport Layer Security (TLS) and Secure SMTP (SMTPS).
Sophos XG Firewall provides the secure connection methods below:
STARTTLS is an extension to plain text communication protocols. STARTTLS is used to provide authenticated Email communication over the Internet. It enables plain text unsecured POP3/IMAP connections to be upgraded to SSL/TLS encrypted sessions on the same port.
POP3S and IMAPS are basically POP3 and IMAP (respectively) over a SSL/TLS session. Encrypted data from the client is sent to the server over a SSL/TLS session.
Note: Administrators can configure scanning of email traffic even if a port other than the standard ports 25, 587 or 465 is used.
The following sections are covered:
Applies to the following Sophos products and versions Sophos Firewall
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