How to Fix SMTP Error in Outlook: Step-by-Step Troubleshooting Guide

Learn how to quickly fix SMTP errors in Outlook with simple settings adjustments and authentication checks to restore your email sending functionality.

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To fix an SMTP error in Outlook, go to File > Account Settings > Email tab and select your account. Click Change > More Settings > Outgoing Server tab and ensure 'My outgoing server (SMTP) requires authentication' is checked. Verify server settings and port numbers under the Advanced tab. Save and restart Outlook. If issues persist, contact your email provider.

FAQs & Answers

  1. What causes SMTP errors in Outlook? SMTP errors in Outlook commonly occur due to incorrect server settings, authentication issues, or port misconfigurations.
  2. How do I enable SMTP authentication in Outlook? In Outlook, go to File > Account Settings > select your account > Change > More Settings > Outgoing Server tab, and check 'My outgoing server (SMTP) requires authentication'.
  3. Which port numbers should I use for SMTP in Outlook? Port 587 is typically used for SMTP with TLS encryption, while port 465 is often used for SMTP with SSL. Verify these with your email provider.

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