Windows live mail server error 421

A frustrating error!

Error 421 is a temporary error that can occur when sending emails using Windows Live Mail. It's usually caused by a problem with the mail server or the email account settings. Here are some possible causes and solutions:

Causes:

  1. Mail server issues: The mail server may be experiencing technical difficulties, maintenance, or high traffic, causing the error.
  2. Account settings: Incorrect or outdated account settings can cause the error.
  3. Spam filters: The mail server's spam filters may be blocking your emails.
  4. Firewall or antivirus software: Firewalls or antivirus software may be blocking the connection to the mail server.

Solutions:

  1. Check the mail server status: Visit the mail server's website or contact your email provider to see if there are any known issues or maintenance scheduled.
  2. Verify account settings: Double-check your account settings, including the server names, port numbers, and authentication settings.
  3. Try a different email client: Try sending emails using a different email client, such as Outlook or Mozilla Thunderbird, to see if the issue is specific to Windows Live Mail.
  4. Check spam filters: Check your email account's spam filters to see if they're blocking your emails. You can try whitelisting the sender's email address or domain.
  5. Disable firewall or antivirus software: Temporarily disable your firewall or antivirus software to see if it's blocking the connection to the mail server.
  6. Clear Windows Live Mail cache: Clear the Windows Live Mail cache by going to Tools > Options > Advanced > Cache and clicking Clear Cache.
  7. Update Windows Live Mail: Make sure you're running the latest version of Windows Live Mail.
  8. Contact your email provider: If none of the above solutions work, contact your email provider's support team for further assistance.

Remember to be patient and try different solutions until you find one that resolves the issue.