Cisco Cisco Email Security Appliance C170 사용자 가이드
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Cisco AsyncOS 8.5 for Email User Guide
Chapter 18 Email Authentication
Enabling SPF and SIDF
What Conformance Level would you like to use?
1. SPF only
2. SIDF compatible
3. SIDF strict
[2]> 1
Would you like to have the HELO check performed? [Y]> y
Would you like to change SMTP actions taken as result of the SPF verification? [N]> y
Would you like to change SMTP actions taken for the HELO identity? [N]> y
What SMTP action should be taken if HELO check returns None?
1. Accept
2. Reject
[1]> 1
What SMTP action should be taken if HELO check returns Neutral?
1. Accept
2. Reject
[1]> 1
What SMTP action should be taken if HELO check returns SoftFail?
1. Accept
2. Reject
[1]> 2
What SMTP action should be taken if HELO check returns Fail?