Cisco Cisco Email Security Appliance C170 사용자 가이드
C H A P T E R
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Cisco IronPort AsyncOS 7.5 for Email Advanced Configuration Guide
OL-25137-01
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Email Authentication
IronPort AsyncOS supports several forms of email authentication, including
Sender Policy Framework (SPF), Sender ID Framework (SIDF), DomainKeys and
DomainKeys Identified Mail (DKIM).
Sender Policy Framework (SPF), Sender ID Framework (SIDF), DomainKeys and
DomainKeys Identified Mail (DKIM).
DomainKeys and DKIM verify the authenticity of email based on a signing key
used by the sender. SPF and SIDF are methods for verifying the authenticity of
email based on DNS TXT records. SPF and SIDF allow the owner of an Internet
domain to use a special format of DNS records to designate which machines are
authorized to send email for that domain.
used by the sender. SPF and SIDF are methods for verifying the authenticity of
email based on DNS TXT records. SPF and SIDF allow the owner of an Internet
domain to use a special format of DNS records to designate which machines are
authorized to send email for that domain.
This chapter contains the following sections:
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