554 5.2.3 mail policy violation

A specific error message!

The error message "554 5.2.3 mail policy violation" is an SMTP error code that indicates that the email message you're trying to send is in violation of the recipient's email policy.

Here's a breakdown of the error code:

• 554: This is the SMTP error code, which indicates that the message was not delivered due to a policy violation.
• 5.2.3: This is a more specific error code that indicates the type of policy violation. In this case, it's likely related to the content of the email message.

Some possible reasons for this error include:

• Spam or phishing content in the email message
• Violation of the recipient's email policy, such as excessive attachments or large file sizes
• Malformed or corrupted email message
• Violation of the recipient's content filtering rules

To resolve this issue, you may need to review the content of your email message and make sure it complies with the recipient's email policy. You may also want to try rephrasing or reformatting the message to avoid triggering the policy violation.

If you're still having trouble, you can try contacting the recipient's email administrator or IT department to ask about their email policy and how to comply with it.