App access to email

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Recommendation

Depends

If email lives in the browser, the permission for Store apps can be closed — that is how the visible BoosterX advice is worded.

Classic clients and browser-based email are not covered by the restriction.

Main effect: Blocking access to email
FPS and memory: See the research

What changes

The toggle blocks supported Store/UWP apps from reading and sending email through the system interface. The same decision at the global level is the toggle in the “Email” section on the “Settings” → “Privacy” page (in Windows 11 — “Privacy and security”). The historical consumer is the “Mail and Calendar” app, which worked with an account mailbox; it has itself been discontinued, and in Windows 11 the generation changed to the new Outlook. After the block, Store email loses access to messages; the messages in the mailbox and the account are not affected.

Exceptions and differences

Email in the browser and classic Win32 clients are not covered by this permission. Related permissions are contacts and calendar: email apps use them together. The set of “Settings” pages differs between Windows 10 and Windows 11 — check whether the section exists on your system.

How to verify the result

Open the “Email” section in “Windows Settings”: the general app access toggle is set to “Off”. Direct observation of the behavior of a specific email app is not part of the check.

How to change and revert

Open “Optimization” → “Privacy” → “App permissions” → “App access to email”, move the toggle to “On”: BoosterX will apply the block on Store apps working with email. Click “Apply”. If “Instant apply” is enabled, a separate button is not required. To revert, move the toggle to “Off” and apply the change again: BoosterX will return Windows to its default state with apps allowed to work with email.

Confirmation

Last check: 2026-09-20.