Notification email with Spam Quarantine Summary is not received by Users

Why are users not receiving notification emails with Spam Quarantine Summary?

Symptoms
The Spam Quarantine is user-based. Symantec Mail Security for SMTP 5 is not sending notification emails containing the Spam Quarantine Summary to the users.

The host to which the notification emails are sent does not receive the emails. This may be because the host can't be found, because the host is not capable of relaying these emails, or because the Quarantine is configured for Administrator Only Quarantine.

To confirm that Quarantine is not set to Administrator Only

1. Log on to the Control Center via the GUI
2. Click Settings> Quarantine
3. Uncheck "Administrator Only Quarantine (LDAP not required)"
   
   NOTE: Unchecking this setting requires an LDAP source and requires you to synchronize LDAP data successfully to the Scanners.

To check the Control Center settings

1. Click Settings> Control Center.
2. Find the section labeled "Control Center Settings."

• If the option "Use existing non-local relay settings" is enabled, check the Outbound Settings of the SMTP host (Settings > Hosts > "hostname" > SMTP tab). If MX lookup is used to resolve non-local addresses, then notification emails may not be received by users.
• If the option "Define new host" is enabled, verify that a host that is able to relay email is selected.

Technical Information
By default, a notification process runs every day and determines if users have new spam messages in Spam Quarantine since the last time the notification process checked.

If so, it sends a message to users who have new spam to remind them to check their spam messages in Spam Quarantine.
You can also choose to send notification digests to users on distribution lists.

The administration guide tells you how to do this.
ftp://ftp.symantec.com/public/english_us_canada/products/symantec_mail_security/5.0.1_smtp/manuals/