Error: 530 5.7.0 Must issue a STARTTLS command first

Products

• Email Security.cloud

Issue/Introduction

The message is bounced back with response:

Environment

Email Security.cloud

Cause

The issue is may be caused by the sender TLS settings.

Resolution

Error Message: "530 #5.7.0 Must issue a STARTTLS command first"
Retries attempt: 0

Under the TLS settings you can enforce all the email by Email security cloud to use TLS, so we expect as well that all the emails will be always accepted with TLS on recipient side. The settings can be unchecked in Client Net portal under Encryption option.

 

Additional Information

You find additional information about TLS under this LINK and chapters that followed.