Cisco Cisco Email Security Appliance C160 Mode D'Emploi
C H A P T E R
20-1
AsyncOS 9.1.2 for Cisco Email Security Appliances User Guide
20
Email Authentication
•
•
•
•
•
•
•
•
•
•
Email Authentication Overview
AsyncOS for Email supports email verification and signing to prevent email forgery. To verify incoming
mail, AsyncOS supports Sender Policy Framework (SPF), Sender ID Framework (SIDF), DomainKeys
Identified Mail (DKIM), and Domain-based Message Authentication, Reporting and Conformance
(DMARC). To authenticate outbound mail, AsyncOS supports DomainKeys and DKIM signing.
mail, AsyncOS supports Sender Policy Framework (SPF), Sender ID Framework (SIDF), DomainKeys
Identified Mail (DKIM), and Domain-based Message Authentication, Reporting and Conformance
(DMARC). To authenticate outbound mail, AsyncOS supports DomainKeys and DKIM signing.
Related Topics
•
.
•
.
•
DomainKeys and DKIM Authentication
With DomainKeys or DKIM email authentication, the sender signs the email using public key
cryptography. The verified domain can then be used to detect forgeries by comparing it with the domain
in the From: (or Sender:) header of the email.
cryptography. The verified domain can then be used to detect forgeries by comparing it with the domain
in the From: (or Sender:) header of the email.
DomainKeys and DKIM consist of two main parts: signing and verification. AsyncOS supports the
“signing” half of the process for DomainKeys, and it supports both signing and verification for DKIM.
You can also enable bounce and delay messages to use DomainKeys and DKIM signing.
“signing” half of the process for DomainKeys, and it supports both signing and verification for DKIM.
You can also enable bounce and delay messages to use DomainKeys and DKIM signing.