Exam 350-701 topic 1 question 625 discussion

Segregating Incoming and Outgoing Mail You can segregate incoming and outgoing email traffic over separate listeners and on separate IP addresses. You can use Internet Protocol version 4 (IPv4) and version 6 (IPv6) addresses. However, the System Setup Wizard on the email gateway supports initial configuration of the following configurations: 2 separate listeners on 2 logical IPv4 and 2 IPv6 addresses configured on separate physical interfaces segregates incoming and outgoing traffic you can assign an IPv4 and an IPv6 address to each listener 1 listener on 1 logical IPv4 address configured on one physical interface combines both incoming and outgoing traffic you can assign both an IPv4 and an IPv6 address to the listener https://www.cisco.com/c/en/us/td/docs/security/esa/esa14-0/user_guide/b_ESA_Admin_Guide_14-0/b_ESA_Admin_Guide_12_1_chapter_010.html