pqueue corrupts long lines in message

I have an email message like this:

    $ sudo postcat /var/spool/postfix/deferred/5/5BC2442B22
    ...
    *** MESSAGE CONTENTS /var/spool/postfix/deferred/5/5BC2442B22 ***
    Received: from vagrant-ubuntu-precise-64 (localhost [127.0.0.1])
     by vagrant-ubuntu-precise-64 (Postfix) with ESMTP id 5BC2442B22
     for <email address hidden>; Fri, 20 Nov 2015 12:24:14 +0000 (UTC)
    From: <email address hidden>
    To: <email address hidden>
    Message-ID: <834926492.1.1448022254386.JavaMail.logicaldoc@vagrant-ubuntu-precise-64>
    Subject: LogicalDOC - Request for password reset
    MIME-Version: 1.0
    Content-Type: multipart/mixed;
     boundary="----=_Part_0_887517735.1448022254335"
    Date: Fri, 20 Nov 2015 12:24:14 +0000 (UTC)

    ------=_Part_0_887517735.1448022254335
    Content-Type: text/html; charset=us-ascii
    Content-Transfer-Encoding: 7bit

    LogicalDOC - Request for password reset <br/> Click here: <a href="http://localhost:8081/pswrecovery? ticketId=932c9c87a6773d2053b6259cdac945e9b48429&userId=1">http://localhost:8081/pswrecovery? ticketId=932c9c87a6773d2053b6259cdac945e9b48429&userId=1</a>
    ------=_Part_0_887517735.1448022254335--
    *** HEADER EXTRACTED /var/spool/postfix/deferred/5/5BC2442B22 ***
    *** MESSAGE FILE END /var/spool/postfix/deferred/5/5BC2442B22 ***

and this is what you will see:

    $ sudo pfqueue
    ...
      │ From: <email address hidden> │
      │ To: <email address hidden> │
      │ Message-ID: <834926492.1.1448022254386.JavaMail.logicaldoc@vagrant-ubuntu-precisSubject: LogicalDOC - Request for password reset │
      │ Subject: LogicalDOC - Request for password reset │
      │ MIME-Version: 1.0 │
      │ Content-Type: multipart/mixed; │
      │ boundary="----=_Part_0_887517735.1448022254335" │
      │ Date: Fri, 20 Nov 2015 12:24:14 +0000 (UTC) │
      │ │
      │ ------=_Part_0_887517735.1448022254335 │
      │ Content-Type: text/html; charset=us-ascii │
      │ Content-Transfer-Encoding: 7bit │
      │ │
      │ LogicalDOC - Request for password reset <br/> Click here: <a href="http://localh------=_Part_0_887517735.1448022254335--773d2053b6259cdac945e9│
      │ ------=_Part_0_887517735.1448022254335--773d2053b6259cdac945e9 │
      │ *** HEADER EXTRACTED deferred/5/5BC2442B22 *** │
      │ *** MESSAGE FILE END deferred/5/5BC2442B22 *** │

Note how the Message-ID header is truncated and has its end overwritten by the Subject header? This smells of a buffer overflow to me.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: pfqueue 0.5.6-8
ProcVersionSignature: Ubuntu 3.2.0-94.134-virtual 3.2.72
Uname: Linux 3.2.0-94-virtual x86_64
ApportVersion: 2.0.1-0ubuntu17.13
Architecture: amd64
Date: Fri Nov 20 12:25:00 2015
MarkForUpload: True
ProcEnviron:
 LC_CTYPE=lt_LT.UTF-8
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pfqueue
UpgradeStatus: No upgrade log present (probably fresh install)