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Problems Checking for New Mail Without a Restart

If you are finding that Postbox can only check for new messages if the app is restarted, it's possible that your server works better with a smaller number of cached connections.

To change this setting,

  • Go to Options | Preferences > Accounts > [your mail account] > Advanced Button
  • Change the number of cached connections from 5 to 1. Restart Postbox.