Email error 550 denied by policy

The infamous "550 denied by policy" error!

Error 550 "Denied by Policy" is a generic error message that can occur when an email is rejected by a mail server due to a policy violation. Here are some common reasons that might trigger this error:

  1. Spam filtering: The recipient's email server or their ISP's spam filtering system has flagged your email as spam and blocked it.
  2. Blacklisting: Your IP address or domain has been blacklisted, which means that the recipient's email server has been instructed to block emails from your IP address or domain.
  3. Content filtering: The recipient's email server has blocked your email due to its content, such as keywords, attachments, or formatting.
  4. Authentication issues: Your email server or your email client is not properly authenticated, which can cause the recipient's email server to reject your email.
  5. Policy restrictions: The recipient's email server or their ISP has implemented specific policies that restrict certain types of emails, such as large attachments or emails with specific subject lines.

To troubleshoot this error, you can try the following:

  1. Check your email content: Review your email content to ensure that it doesn't contain any spammy keywords, attachments, or formatting that might trigger a spam filter.
  2. Verify your authentication: Ensure that your email server or email client is properly authenticated with the recipient's email server.
  3. Check your IP address: Verify that your IP address is not blacklisted. You can use online tools like MX Toolbox or Spamhaus to check your IP address.
  4. Contact the recipient: Reach out to the recipient and ask them to check their email server's logs to see if they can provide more information about the error.
  5. Contact your email provider: If you're using a third-party email service, contact their support team to see if they can help you troubleshoot the issue.
  6. Check your email client settings: Ensure that your email client is configured correctly and that you're using the correct SMTP settings.

If none of these troubleshooting steps resolve the issue, you may need to contact the recipient's email administrator or IT department for further assistance.