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Don't Mark Mail from Trusted Domains as Junk

If you have one or more domains you never want messages marked as junk from (such as a corporate intranet), you need to configure a hidden preference.

  • Open Config Editor.
  • Type "mail.trusteddomains" into the "Filter:"  textbox.
  • Double-click on that row.
  • Enter a comma delimited list of trusted domains such as "postbox-inc.com,getpostbox.com").
  • Restart Postbox.

Messages from senders in that domain will no longer be marked as junk.