Docs Error Library Error 530-5.7.0: Must issue a STARTTLS command first

Error 530-5.7.0: Must issue a STARTTLS command first

What Is Causing This Error?

The ‘error 530-5.7.0’ issue typically occurs when the email server attempts to send an email without establishing a secure connection.

This error indicates that the server expects the email client to issue the STARTTLS command. This command secures the connection before sending the email to the recipient.

If the SMTP server is missing the required encryption settings, you’ll likely encounter this error.

Resolving the Error – Solution

To fix this error, we recommend checking that the TLS/SSL encryption required to securely send emails is enabled on your SMTP server and the user’s email client.

Also, review your SMTP server’s configuration to ensure the encryption protocols are properly set. Using the wrong port could potentially lead to the error 530-5.7.0 issue.

For most email service providers, this would be port 587 for STARTTLS or port 465 for SSL/TLS.

While reviewing your SMTP server settings, ensure the username and password you’ve configured are correct as well.

That’s it! Now you know how to fix the ‘error 530-5.7.0’ issue.

If you’d like to learn how to troubleshoot other common errors, check out the following tutorials: