I'm having a hard time, the emails that comes from Exchange to Ironport are not logged in messaging track (but are being sent), and received not show your company's domain in the correct format (firstname.lastname@example.org), appear unknown characters (alphanumeric).
Please do the following on the CLI of the appliance to check if there is any connection attempts from the exchange to the appliance and then to find out the mail flow (as you said its not appearing in the message tracking logs something may be happening at connection level, or perhaps the email is not going through the appliance)
CLI > grep "exchange IP" -t mail_logs
Run a few test emails.
Monitor this log once you see some data you will see the connecting server to the appliance also what sendergroup it's matching after which if the email is accepted, an MID should appear where you will be able to review the message details as it goes through the appliance and the injected information.
do a findevent > search by MID and enter this MID Or CLI > grep "MID XXX" mail_logs
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...