From user@testserver
From: Mail Delivery System <postmaster-dsn@testserver>
To: <user@testserver>
Subject: Mail delivery failed: returning message to sender
Message-ID: *
Date: *
X-Failed-Recipients: fail@testserver, 
Auto-Submitted: auto-replied

Delivery to the following recipient(s) failed permanently:

  - fail@testserver
  

----- Technical details -----

- "false" (PIPE) failed with error:
    exit status 1


----- Original message -----

Received: from user user@testserver
	by *
	(envelope from "user@testserver")
	on ; *
Date: *
From: Mailer daemon <somewhere@horns.com>
Subject: I've come to haunt you

Muahahahaha