IronPort - advanced configuration guide

Chapter 6 Using Message Filters to Enforce Email Policies
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Note Unlike the spf-status rule, the spf-passed rule reduces the SPF/SIDF verification values to a simple
Boolean. The following verification results are treated as not passed in the spf-passed rule: None,
Neutral, Softfail, TempError, PermError, and Fail. To perform actions on messages based on more
granular results, use the spf-status rule.
Workqueue-count Rule
The workqueue-count rule checks the workqueue-count against a specified value. All the comparison
operators are allowed, such as >, ==, 1000) {
}
skip-spamcheck();
For more information on SPF/SIDF, see Overview of SPF and SIDF Verification, page 5-22.
SMTP Authenticated User Match Rule
If your Cisco IronPort appliance uses SMTP authentication to send messages, the
smtp-auth-id-matches ( [, ])rule can check a message’s headers and Envelope
Sender against the sender’s SMTP authenticated user ID to identify outgoing messages with spoofed
headers. This filter allows the system to quarantine or block potentially spoofed messages.
The smtp-auth-id-matches rule compares the SMTP authenticated ID against the following targets:
Target Description
*EnvelopeFrom Compares the address of the Envelope Sender (also known
as MAIL FROM) in the SMTP conversation
*FromAddress Compares the addresses parsed out of the From header.
Since multiple addresses are permitted in the From:
header, only one has to match.
*Sender Compares the address specified in the Sender header.
*Any Matches messages that were created during an
authenticated SMTP session regardless of identity.
*None Matches messages that were not created during an
authenticated SMTP session. This is useful when
authentication is optional (preferred).
The filter performs matches loosely. It is not case-sensitive. If the optional sieve-char parameter is
supplied, the last portion of an address that follows the specified character will be ignored for the
purposes of comparison. For example, if the + character is included as a parameter, the filter ignores the
portion of the address joe+folder@example.com that follows the + character. If the address was
Cisco IronPort AsyncOS 7.6 for Email Advanced Configuration Guide
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