Status 5.1.1 email

You're referring to the email status "5.1.1"!

In email delivery, the status code "5.1.1" is a temporary error code that indicates a "Syntax error in subject or header". This error occurs when the email client or server encounters a problem with the subject line or header of the email message.

Here's a breakdown of what this error code typically means:

• 5.1: The error is related to the email message's syntax or format.
• 1: The specific error is related to the subject line or header.

Common causes of this error include:

1. Malformed or invalid characters in the subject line or header.
2. Excessive length of the subject line or header.
3. Incorrect or missing header fields (e.g., "From:", "To:", etc.).

To resolve this issue, you can try the following:

1. Check the subject line and header for any errors or invalid characters.
2. Verify that the subject line and header are within the allowed length limits.
3. Ensure that all required header fields are present and correctly formatted.
4. If you're using an email client, try resending the email or checking the email settings.

If you're still experiencing issues, feel free to provide more details, and I'll do my best to help you troubleshoot the problem!