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How do I stop Gmail from loading new emails?

From EverybodyWiki Bios & Wiki

Another possible cause for this problem is your desktop client. In some cases, a large file may be preventing Gmail from loading new emails. To resolve this problem, uninstall the files that are causing the issue. For example, if you have a large number of photos or videos, you must delete the files in the folder where you downloaded them. Besides, you must remove the files that are causing the problem in your desktop client.

For more info - https://emailsdesk.com/