Add Email disclaimers to every outgoing in postfix

I need to add email disclaimer in every outgoing mail. I found one solution (i.e altermime) BUT its not working.
No error is there, i am able to send and receive mails  but no disclaimer is attach to any mail.

I ref follwing site:

https://www.howtoforge.com/add-automatic-disclaimers-to-outgoing-emails-with-altermime-postfix-fedora8
Please Help, Its very very urgent.