- Step 1:Try logging in to your Mac computer from a Guest account.
- Step 2:Temporarily delete any junk or cache files.
- Step 3:Click the Go menu and select the Go to Folder option from the displayed list.
- Step 4:In the Go to Folder dialog box, type /Library/ in the search section, and click on the Go button.
- Step 5:Open the Preferences folder in the Library.
- Step 6:Remove any apps that are causing trouble and move the apps to the Trash folder.
- Step 7:Reboot the Mac computer and verify whether the issue is resolved.
- Step 8:Click the Apple menu and select System Preferences from the displayed list.
- Step 9:Go to the Users & Groups section to check the list of apps.
- Step 10:Remove all the apps that start-up automatically. Click on the Minus icon to remove an item from the list.
- Step 11:Clean all the junk files on the hard disk to resolve this Mac mail error 25308.
- Step 12:You can use a utility to optimize your Mac.
- Step 13:Manage the start-up items to clean the useless files.
- Step 14:If the issue persists, you can use a Mac Optimizer to clean unwanted files.
- Step 15:Make sure to download the Mac Optimizer from a trusted source.
- Step 16:Open Mac Optimizer and click on the System Scan button.
- Step 17:Click Clean to clear the junk files on your computer.
- Step 18:Now, reboot your Mac to fix the issue.
- Step 19:You can click on the Call button on this page to get in touch with our technical support team to fix the Mac mail error 25308.