Which SMTP extension does Cisco ESA support for email security?

Which SMTP extension does Cisco ESA support for email security?
A . ETRN
B . UTF8SMTP
C . PIPELINING
D . STARTTLS

View Answer

Answer: D

Explanation:

STARTTLS is an SMTP extension that allows email servers to negotiate a secure connection using TLS or SSL encryption. Cisco ESA supports STARTTLS for both inbound and outbound email delivery.

Reference: https://www.cisco.com/c/en/us/td/docs/security/esa/esa12-0/user_guide/b_ESA_Admin_Guide_12_0/b_ESA_Admin_Guide_12_0_chapter_011000.html