How to Set Your Default Mail Client



To change your default mail handler from your existing mail client to Postbox, please follow these steps:

  1. Select Preferences from the Postbox menu, and click the General tab.
  2. Click the Check Now button, and make sure that "Email" is selected.
  3. Close the Preferences pane.
  4. Open Apple Mail (yes, Apple Mail!), then go to Preferences.
  5. Under the General tab, select Postbox as your default mail application.

To switch from Postbox to Apple Mail:

  1. Open both Apple Mail and Postbox.
  2. In Apple Mail, go to Preferences > General and set Apple Mail as the default. Leave the app open.
  3. In Postbox, go to Preferences > General, click the Check Now button, and make sure that "Email" is not selected.


  1. Select Options from the Tools menu, and click the General tab.
  2. Under System Defaults, click the Check Now button, and make sure that "Email" is checked.
  3. Close the Preferences pane.
  4. In Windows, go to the Control Panel > Programs > Default Programs
  5. Click on Associate a file type or protocol with a program
  6. Double-click on the "MAILTO" option.
  7. You will see all the currently installed Email clients on your PC in a new window. Just click on the email client you would like to use and click "OK." The Page will start loading again, and after a short delay, your default email client will be changed, and you can see it under the "Current Default" column.

You can test if Postbox is set correctly by clicking on an email link on our contact page.  If Postbox comes up, then the handler is working correctly.

To set another email client as the default, simply reverse these steps.

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