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Enable Mail Plug-in
- 1.Click “Install Mail Plug-in...” from the AltServer menu.
- 2.Enter your password to grant AltServer permission to install the plug-in.
3. Open Mail (quit Mail first if it was already running).
4. Open Mail > Preferences and click “Manage Plug-ins...”

5. Enable
AltPlugin.mailbundle
.
6. Click “Apply and Restart Mail” to finish installing the Mail plug-in.