Apple Mac OS X Server (Administrator’s Guide) - Manual (Page 403)

Mail Service 403
3 Click the Outgoing Mail tab.
4 Enter the number of hours you want the mail service to attempt to deliver a message before
the message expires.
The default is 72 hours.
5 Enter the number of minutes you want the mail service to wait between delivery attempts.
The smallest number allowed is 1 minute; the default is 20 minutes.
6 Optionally click “Notify sender of non-delivery after __ hours” and enter the number of
hours.
7 Optionally click “Notify postmaster of non-delivery.”
8 Click Save.
Note: These options are disabled if the pop-up menu is set to “Limit to local users.”
Sending Nondelivery Reports to Postmaster
When a user on your network sends mail that can’t be delivered, a nondelivery report is sent
back to the user. If for some reason the report can’t be delivered, you can set up mail service
to send the report to the postmaster account. Be sure you’ve set up a user account named
“postmaster.”
Nondelivery reports are not normally sent for mail designated as “bulk,” but you can also
generate nondelivery reports for bulk mailings.
To report undelivered mail to the postmaster account:
1 In Server Settings, click the Internet tab.
2 Click Mail Service and choose Configure Mail Service.
3 Click the Protocols tab and choose SMTP from the pop-up menu.
4 Click SMTP Options.
5 Click one or both of the nondelivery options, then click Save.
Monitoring Mail Status
This section explains how to use the Server Status application to monitor the following:
m overall mail service activity
m connected mail users
m mail accounts
m mail service logs