300-720 Exam Dumps : Securing Email with Cisco Email Security Appliance (300-720 SESA)

[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_011010.html, , DHAP (Directory Harvest Attack Prevention) is a feature that must be used to address this issue. DHAP is a mechanism that allows Cisco ESA to prevent directory harvest attacks, which are attempts by spammers or hackers to obtain valid email addresses from an LDAP server by sending messages with random or guessed recipients and checking for bounce messages., To enable DHAP on Cisco ESA, the network administrator can follow these steps:, Select Network > Listeners and click Edit Settings for the listener that receives incoming messages., Under SMTP Authentication Settings, select Enable Directory Harvest Attack Prevention., Enter a value for Maximum Invalid Recipients per Hour, which is the number of invalid recipients that triggers DHAP., Enter a value for Block Sender for (hours), which is the duration that Cisco ESA blocks messages from senders who exceed the maximum invalid recipients per hour., Click Submit., ]