This article applies to:

• Trustwave MailMarshal (SEG) 6.9.9 and above

Question:

• Notifications of delayed delivery are only sent to local recipients
• How do I send delay notifications for incoming messages to the original sender?

Procedure:

By default MailMarshal sends notifications of delayed delivery only to local users (email addresses matching the Local Domains table). In practice this means that delay messages are sent only for outgoing messages. 

If you want to send delay notifications to external users (where the delayed message originated in a non-local domain), you can configure this behavior using a Registry entry.

1. On the Array Manager, edit the Registry (10.X: use Advanced Settings in the Management Console)
2. Navigate to the SEG Sender key:
   • In version 8.X: HKEY_LOCAL_MACHINE\SOFTWARE\Trustwave\Secure Email Gateway\Default\Sender
   • 10.X: value names have the prefix Engine. (Sender dot).
   • For full details of the location for each product version, see article Q10832.
3. Create a DWORD value SuppressExternalNotifications
4. Set the value to 0
5. Reload MailMarshal configuration.

Notes:

As always, take due care when editing the Registry.