Following Scenario: [Internet] --- [UTM] --- [Mailserver], whereas:
Mailserver = mail.mailserver.com (hostname)
UTM (bridge mode) = mailserver.com (hostname)
UTM (in transparent mode) is only responsible for mail protection and thus acts as the MTA.
Now, in order to hold DNSSEC chain upright and make DANE verification possible (strict cert checks etc), the UTM needs to have the same hostname as
the mailserver itself, but while doing so, i get (logically) the message: "Undelivered Mail Returned to Sender", "mail for email@email.email loops back to myself".
Question: Any way of having the same hostname (mail.mailserver.com) on UTM and Mailserver itself? If one changes the Mailservers hostname, one would run into a whole bunch of other new problems. The goal is that UTM is acting as a spam/virus filter for E-Mails in an virtual environment.
Any help is appreciated.
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