Cisco Cisco Email Security Appliance C650 Guía Del Usuario
21-6
User Guide for AsyncOS 9.7 for Cisco Email Security Appliances
Chapter 21 Email Authentication
Configuring DomainKeys and DKIM Signing
Procedure
Step 1
On the Mail Flow Policies page (from the Mail Policies menu), click on the RELAYED mail flow policy
(outgoing).
(outgoing).
Step 2
From the Security Features section, enable DomainKeys/DKIM Signing by selecting On.
Step 3
Submit and commit your changes.
Enabling Signing for Bounce and Delay Messages
In addition to signing outbound messages, you may want to sign bounce and delay messages. You may
want to do this to alert recipients that the bounce and delay messages they receive from your company
are legitimate. To enable DomainKeys and DKIM signing for bounce and delay messages, you enable
DomainKeys/DKIM signing for the bounce profile associated with the public listener.
want to do this to alert recipients that the bounce and delay messages they receive from your company
are legitimate. To enable DomainKeys and DKIM signing for bounce and delay messages, you enable
DomainKeys/DKIM signing for the bounce profile associated with the public listener.
Procedure
Step 1
On the bounce profile associated with the public listener where you will send signed outbound messages,
go to Hard Bounce and Delay Warning Messages.
go to Hard Bounce and Delay Warning Messages.
Step 2
Enable “Use Domain Key Signing for Bounce and Delay Messages”:
Note
to sign bounced and delay messages.
Note
The From: address in the domain profile must match the address used for the bounce return address. To
ensure these addresses match, you can configure a return address for the bounce profile (System
Administration > Return Addresses), and then use the same name in the Profile Users list in the domain
profile. For example, you would configure a return address of MAILER-DAEMON@example.com for
the bounce return address, and add MAILER-DAEMON@example.com as a profile user in the domain
profile.
ensure these addresses match, you can configure a return address for the bounce profile (System
Administration > Return Addresses), and then use the same name in the Profile Users list in the domain
profile. For example, you would configure a return address of MAILER-DAEMON@example.com for
the bounce return address, and add MAILER-DAEMON@example.com as a profile user in the domain
profile.
Configuring DomainKeys/DKIM Signing (GUI)
Procedure
Step 1
Create a new or import an existing private key. For information on creating or importing signing keys,
see
see
.
Step 2
Create a domain profile and associate the key with the domain profile. For information on creating a
domain profile, see
domain profile, see
.
Step 3
Create the DNS text record. For information about creating the DNS text record, see