View incoming mail DKIM status in mail content

==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Debian 7
- Related log if you're reporting an issue:
====

Hello,

The DKIM verification system of iredmail is working perfectly but the result is only visible in the headers of the incoming e-mails.

I would like to be able the DKIM results directly into the body text of each e-mail that I receive, so something like that:

<e-mail original message>
<if dkim is correct: "the sender address has been verified and is legit">

or

<e-mail original message>
<if dkim is false or not used: "the sender address could not be verified. Proceed with caution."

Thanks in advance for your help!