Which SMTP extension does Cisco ESA support for email security?
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A. B. C. D.D.
https://www.cisco.com/c/en/us/td/docs/security/esa/esa12-0/user_guide/b_ESA_Admin_Guide_12_0/The Simple Mail Transfer Protocol (SMTP) is a widely used protocol for sending email messages between servers. SMTP extensions are additional features that extend the functionality of the protocol.
The Cisco Email Security Appliance (ESA) is a security solution designed to protect organizations from email-based threats such as spam, viruses, and phishing attacks.
Regarding the given options, Cisco ESA supports the STARTTLS SMTP extension for email security.
STARTTLS is a security feature that provides encryption for email messages sent over SMTP. It upgrades a regular SMTP connection to an encrypted one using Transport Layer Security (TLS) or Secure Sockets Layer (SSL) protocols. This ensures that the content of the email is protected from eavesdropping or tampering during transmission.
ETRN (Extended Turn) is an SMTP extension that allows a remote SMTP server to request email messages from a receiving server. This extension is used mainly for server-to-server email communication, and it is not directly related to email security.
UTF8SMTP is an SMTP extension that supports the use of Unicode characters in email messages. This extension enables the use of non-ASCII characters, such as Chinese or Arabic characters, in email messages. Although it can be useful for multilingual email communication, it is not a security-related feature.
PIPELINING is an SMTP extension that allows multiple commands to be sent at once, without waiting for each command's response. This feature can improve the performance of the SMTP protocol, but it is not directly related to email security.
In summary, Cisco ESA supports the STARTTLS SMTP extension for email security, which provides encryption for email messages sent over SMTP, protecting them from interception or tampering.