You can change the password to your Direct Mail account.
- Choose Direct Mail > Direct Mail Account from the menu bar.
- Click the "Change" button located next to your password.
- Enter your old password.
- Enter your new password in both new password fields.
- Click "Change Password".
If you have signed in to your Direct Mail account from other devices (like other Macs using Direct Mail, or an iOS device using Stamps), changing your password will not automatically sign out those devices. You can use the Account Activity section of your account control panel to see what devices are signed in to your account and, if you want, sign out other devices.