You can use either an LDAP server or an SMTP server as your authentication source.
If you choose an LDAP server, you must have or create a directory data source for authentication. See the links in step 5 for more information.
If you choose SMTP forwarding, you must provide details for an SMTP server that supports SMTP authentication. This server cannot be another Symantec Messaging Gateway appliance. Skip step 2 and see the link in step 3 for more information.
Using SMTP forwarding may have an adverse impact on mail processing performance.
Required if you choose LDAP
Choose your authentication method.
You can authenticate user passwords using either simple bind or password fetching.
If you do not create a custom LDAP query, Symantec Messaging Gateway defaults to using simple bind. If you want to use password fetching you must create a custom LDAP query.
Symantec Messaging Gateway supports SMTP authentication via LDAP using simple bind for all supported LDAP directory types. For SMTP authentication via LDAP using password fetching, all supported directory types except Active Directory, Active Directory Global Catalog, and Domino are supported.
Configure SMTP authentication mail settings.
Enable authentication and provide key authentication details, including whether you will authenticate client credentials via LDAP or via SMTP forwarding.
You must use an IP address/port combination for SMTP authentication that is different from both your inbound and outbound IP address/port combinations.