550 5.7.1 rejected trustmanager in reply to mail from command
A SMTP error!
The error message "550 5.7.1 rejected trustmanager in reply to mail from command" is a response from a mail server indicating that it has rejected an email message due to a trust issue.
Here's a breakdown of the error code:
550: This is a permanent error code, indicating that the email message cannot be delivered.5.7.1: This is a specific error code within the 5.7.x range, which is related to authentication and trust issues.rejected trustmanager in reply to mail from command: This is a descriptive text explaining the reason for the rejection. In this case, it suggests that the mail server has rejected the email because it cannot trust the "trustmanager" (likely a reference to the TLS certificate or trust anchor used for encryption) in response to a command from the mail client.
Common causes of this error include:
- Invalid or expired TLS certificate: The mail server may be rejecting the email because it cannot verify the TLS certificate presented by the mail client. This could be due to an expired or invalid certificate, or a certificate that is not trusted by the mail server.
- Misconfigured mail client: The mail client may be configured incorrectly, leading to an invalid or incomplete TLS handshake.
- Firewall or network issues: Firewalls or network issues may be blocking the TLS handshake or preventing the mail server from verifying the trustmanager.
To resolve this issue, you may need to:
- Check the TLS certificate on your mail server and ensure it is valid and trusted.
- Verify that your mail client is configured correctly for TLS encryption.
- Check your firewall and network settings to ensure they are not blocking the TLS handshake.
- Contact your mail server administrator or IT department for assistance if you are unsure about the configuration or troubleshooting steps.