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Email & Outlook

Outlook Error 0x800CCC0E / 0x800CCC0F with Gmail or Yahoo? It's Modern Auth, Not Ports

Published June 10, 2026 · by The FixHub Team

Classic Outlook fails on Send/Receive with (0x800CCC0E) or (0x800CCC0F): “The connection to the server was interrupted” — typically on a Gmail or Yahoo account.

Why “fix the ports” is the wrong rabbit hole: the common advice is to fiddle with SSL ports, firewall, or antivirus. But Gmail and Yahoo dropped basic authentication — classic Outlook can’t sign in with just your normal password anymore. The fix is provider-side modern auth / app passwords, not port tweaks.

Fix 1: Use an app password (or re-add with OAuth)

  • Gmail: enable 2-Step Verification on the Google account, then create an App Password and use that (not your normal password) in Outlook — or remove and re-add the account so Outlook does the Google OAuth sign-in.
  • Yahoo: generate an app password in Yahoo Account Security and use it in Outlook.

This is the actual resolution for 0x800CCC0E/0F on these providers.

Fix 2: Re-add the account so Outlook uses modern auth

  1. File → Account Settings → Account Settings, remove the Gmail/Yahoo account.
  2. Add Account again — Outlook should pop the provider’s browser sign-in (OAuth). Complete it.
  3. Keep the data file when prompted so you don’t lose mail.

Fix 3: Update Outlook + check the TLS 1.3 reg key

  • Make sure Outlook is fully updated (old builds lack proper OAuth handling).
  • On some Windows 10 setups, a TLS 1.3 registry key triggers this — a documented trigger that port-tweaking never touches; updating Windows/Outlook resolves it.

Fix 4: Verify server settings (only after the above)

If still failing, confirm IMAP/SMTP servers and that SSL/TLS is on — but with app password/OAuth in place, defaults usually just work.

FAQ

It’s a Microsoft 365/Exchange account, not Gmail. Then it’s a different family — see Outlook keeps asking for your password and 0x8004010F data file error.

My password is definitely correct. For Gmail/Yahoo your normal password no longer works in classic Outlook — you must use an app password or OAuth (Fix 1).

Sources: Microsoft Support — Errors 0x800CCC0E / 0x800CCC0F syncing Gmail and Yahoo in classic Outlook