Gmail Not Syncing in Mail App Windows 11 Fix [2026]

Quick Answer: Gmail sync fails due to authentication changes. Remove and re-add account in Mail app, use app-specific password if 2FA enabled.

Fix

Mail app → Accounts → Gmail → Delete → Add account again

Gmail settings → Forwarding and POP/IMAP → IMAP Access → Enable

If 2FA on, generate app password at Google Account → Security → App passwords

Mail app → Settings → Manage accounts → Gmail → Change settings → Sync options

Againly runs check_app_cache to detect email sync issues.

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Instant Resolution

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Works on Windows 10 & 11 • No credit card required