Cisco Cisco Email Security Appliance C160 Mode D'Emploi
Chapter 4 Email Authentication
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Cisco IronPort AsyncOS 7.1 for Email Advanced Configuration Guide
OL-22164-02
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Relaxed. The “relaxed” header canonicalization algorithm performs the
following: empty lines are stripped at the end of the body, white spaces are
reduced to a single space within lines, and trailing white spaces are stripped
in lines.
following: empty lines are stripped at the end of the body, white spaces are
reduced to a single space within lines, and trailing white spaces are stripped
in lines.
•
Simple. Empty lines at the end of the body are stripped.
Step 7
Select a signing key (If you have already created a signing key, otherwise, skip to
the next step). You must create (or import) at least one signing key in order to have
signing keys to choose from in the list. See
the next step). You must create (or import) at least one signing key in order to have
signing keys to choose from in the list. See
Step 8
Select the list of headers to sign. You can select from the following headers:
•
All. AsyncOS signs all the headers present at the time of signature. You may
want to sign all headers if you do not expect headers to be added or removed
in transit.
want to sign all headers if you do not expect headers to be added or removed
in transit.
•
Standard. You may want to select the standard headers if you expect that
headers may be added or removed in transit. AsyncOS signs only the
following standard headers (if the header is not present in the message, the
DKIM signature indicates a null value for the header):
headers may be added or removed in transit. AsyncOS signs only the
following standard headers (if the header is not present in the message, the
DKIM signature indicates a null value for the header):
–
From
–
Sender, Reply To-
–
Subject
–
Date, Message-ID
–
To, Cc
–
MIME-Version
–
Content-Type, Content-Transfer-Encoding, Content-ID,
Content-Description
Content-Description
–
Resent-Date, Resent-From, Resent-Sender, Resent-To, Resent-cc,
Resent-Message-ID
Resent-Message-ID
–
In-Reply-To, References
–
List-Id, List-Help, List-Unsubscribe, LIst-Subscribe, List-Post,
List-Owner, List-Archive
List-Owner, List-Archive
Note
When you select “Standard”, you can add additional headers to sign.