Mac OS X Server 10.4 or later can be locked down to only accept email from the MailRoute servers by following these steps:
- In Server Admin, select Mail in the Computer & Services pane
- Click Settings
- Select the Relay tab
- Check Accept SMTP relays only from these:
- Edit the list of hosts:
- Click the Add (+) button to add a host to the list: 22.214.171.124/21
For more information about configuring Mac OS X server, please see http://manuals.info.apple.com/en_US/Mail_Service_v10.4.pdf
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Contact email@example.com or firstname.lastname@example.org for more information.
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