Envelopes with Delivery Failure - TLS is required, but was not offered by host

Issue

Envelope has a Delivery Failure status with the message "Auto Responded: Correct to fix email address errors."
Sender may receive email notification for the envelope stating
"Documents sent for signature could not be delivered to this email address

The destination email system provided this error message:

X-Postfix; TLS is required, but was not offered by host [recipient's domain]"

Cause

The recipient's mail server does not accept inbound emails with TLS 1.1 or higher. 
 

Solution

Steps:

  1. Resend the envelope
  2. Advise the recipient that their mail server should be updated to accept inbound emails with TLS 1.1 at a minimum.