Sisimai::Lhost::Exim cannot parse a email rejected by local scanning code

[azumakuniyuki]

https://github.com/Exim/exim/blob/master/test/mail/0021.userx
https://github.com/Exim/exim/blob/master/test/mail/0536.user1

From MAILER-DAEMON Tue Mar 02 09:44:33 1999
Received: from EXIMUSER by myhost.test.ex with local (Exim x.yz)
    id 10HmbC-0005vi-00
    for userx@test1; Tue, 2 Mar 1999 09:44:33 +0000
Auto-Submitted: auto-replied
From: Mail Delivery System <Mailer-Daemon@test.ex>
To: userx@test1
Subject: Mail failure - rejected by local scanning code
Message-Id: <E10HmbC-0005vi-00@myhost.test.ex>
Date: Tue, 2 Mar 1999 09:44:33 +0000

A message that you sent was rejected by the local scanning code that
checks incoming messages on this system. The following error was given:

  don't like sender userx@test1

------ This is a copy of your message, including all the headers. ------