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Error 0x800CCC0E

How to Fix Outlook Error 0x800CCC0E (Connection to Server Failed)

Fix time: 10 mins Difficulty: Easy 0 views Updated: July 2026

Fix mail server handshake issues and account configuration errors in Outlook.

Symptoms

  • Outlook send/receive fails with error 0x800CCC0E

Common Causes

  • Blocked IMAP/SMTP port, incorrect mail server addresses

Step-by-Step Solutions

Method 1: Verify Port and SSL Settings

  1. Open Outlook Account settings.
  2. Verify SMTP port is set to 465 (with SSL/TLS) or 587 (STARTTLS).
  3. Verify IMAP port is set to 993 (SSL/TLS).

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Frequently Asked Questions

Your ISP may have recently blocked unencrypted ports like 25 to prevent spam.