Email clients: official downloads, mailbox access, and account permissions

Basic check order

1. Start from the vendor, open-source project, Microsoft Store, Mac App Store, or official documentation route rather than a generic “mail client download” result.
2. Confirm which accounts the client can access: mailbox, calendar, contacts, attachments, signatures, aliases, shared mailboxes, and delegated accounts.
3. Review whether messages, metadata, AI summaries, tracking protection, templates, or search indexes are processed locally or through a cloud service.
4. Check subscription tier, personal-versus-business license terms, team features, support channel, and commercial-use limits before company rollout.
5. Define account ownership, OAuth consent, app passwords, local cache location, backup/retention, device encryption, and offboarding steps.
6. For work mail, document the official URL, approved version, allowed mailbox types, retention policy, and who can revoke access if a device is lost.

Cautions and operating tips

• Mailbox access is more sensitive than ordinary app data because email clients can expose contracts, invoices, reset links, calendar invites, and contacts.
• OAuth consent screens, browser add-ons, and calendar/contact permissions should be reviewed alongside the desktop installer.
• If the product includes AI reply drafting, summarization, or categorization, check whether email content or metadata leaves the organization-controlled environment.
• Local mail caches and attachment downloads should follow the same encryption, backup, and disposal rules as the email service itself.

Common scenarios

FAQ

Related guide checklists

Related official download guides