Google Message Encryption Administration Guide - Manual (Page 23)

24 Postini Encryption Services Administration Guide
When Policy Enforced TLS blocks an inbound message, your administrator will
see the following alert:
This message is an automated alert from your email protection
service.
Your email protection service was unable to accept messages from
the following domain, because the domain's mail server cannot use
TLS:
Your Inbound TLS by Domain encryption policy requires this domain
to send messages using TLS. Your email protection service returns
messages from this domain if the domain's mail server cannot
establish a TLS connection with the service.
Recommended action: Contact the email administrator for domain
.
When Policy Enforced TLS blocks an outbound message, your administrator will
see the following alert:
This message is an automated alert from your email protection
service.
Your email protection service was unable to send messages to the
following domain, because the domain's mail server cannot use TLS:
Your Outbound TLS by Domain encryption policy requires this domain
to receive messages using TLS. Your email protection service
returns messages sent to this domain if the domain's mail server
cannot establish a TLS connection with the service.
Recommended action: Contact the email administrator for domain
.