EMAIL SECURITY APPLIANCE ( ESA)
--> ESA protects E-Mail Infrastructure and employees who
use email at work by filtering unwanted emails and malicious email before it
reaches to the user.
--> ESA is a type of firewall and threat monitoring
appliance for SMTP Traffic ( Port Number 25).
--> ESA Provides following Services
i) Limits and Filters emails based upon Reputation Score.
ii) Can block Spam and threats ( Viruses, Malwares) before
they enter into the network.
iii) Provides Data Loss Prevention.
iv) Provides BackLists and WhiteLists Feature.
v) Provides Encryption via Cisco Registered Envelope
Service.
vi) Provides protection from zero day attacks by using
OutBreak Fllters.
ESA Deployment Methods
i) Physical
ii) Virtual
iii) Hybrid (Cloud Based Email Security for Inbound and
Physical Appliance for Outbound)
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