Hi all,
I am attempting to integrate a 3rd party encryption service with Cisco ESA.
The expected mail flow route is 365 -> ESA -> encryption server -> ESA -> final delivery.
My encryption server requires SMTP Auth, SNI and SSL/TLS.
I have a TLS enforced in an entry to the destination controls table.
I have SMTP Auth configured as part of an SMTP delivery route.
However, I cannot see where SNI can be configured, I need ESA to present the domain of the encryption server during the TLS handshake.
Error message is: H=(esa1.hc0000-51.iphmx.com) [216.xx.xxx.xxx] X=TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256 CV=no F=<sender@domain> rejected RCPT <recipient@domain>: Unauthorized
Can anyone assist? Thanks in advance
