Error Description
SMTP error 502 is a permanent or "5xx" error code returned by a mail server to indicate that the server has encountered a command or request that it does not support or cannot process. This error signifies that the server refuses the email message or command due to incompatibility or limitations.
What's Causing This Error?
SMTP error 502 can be caused by various factors, including:
- Unsupported commands: The sender's email client or server may be issuing SMTP commands that the recipient server does not recognize or support.
- Configuration issues: The recipient server may have specific configurations or restrictions that cause it to reject certain types of emails or commands.
- Policy limitations: The server's policies or restrictions can result in SMTP error 502 if the sender's request or email content does not comply.
How to fix SMTP Error 502?
- Check email client or server settings: Review the settings and configurations of the email client or server to ensure that it is using compatible SMTP commands and adhering to best practices.
- Review recipient server policies: Consult the recipient server's documentation or contact its administrators to understand its policies and limitations. Ensure that your emails and commands comply with these policies.
- Test and adjust: If you encounter SMTP error 502, consider testing different configurations or SMTP commands to find a compatible method for communicating with the recipient server.
SMTP Error 502 Examples
Example 1: "502 5.5.1 Command not recognized. Check your SMTP command."
Example 2: "502 5.3.2 Configuration restrictions prevent this request. Contact the administrator for assistance."
Example 3: "502 5.7.0 Policy limitations prevent email delivery. Review and adjust your email content."
Example 4: "502 5.4.1 Incompatible SMTP command. Ensure your client or server is configured correctly."
