Bug#545278: exim4: vacation transport fails on (correctly encoded) non-ascii in subject

[Wichert Akkerman]

Package: exim4
Version: 4.69-9
Severity: normal

I have a simple vacation transport which looks like this:

virtual_vacation:
	driver			= autoreply
	user			= VIRTUAL_USER
	group			= VIRTUAL_GROUP
	home_directory		= /srv/mx1.simplon.biz/mail/${domain}/${local_part}
	file			= $home/.vacation
	file_expand
	once			= $home/.vacation.db
	once_repeat		= 14d
	from			= $local_part@$domain
	to			= $sender_address
	subject			= "Re: $h_subject"

If I receive an email with a subject containing a non-ASCII character
this transport fails with an error like this:

2009-09-04 12:59:53 1MjWWG-0004a9-Fw ** wichert at simplon.biz R=virtual_vacation T=virtual_vacation: Expansion of "Re: $h_subject" in virtual_vacation transport contains non-printing character 195 

The subject was properly encoded and contained no non-ASCII characters
during transport:

Subject: =?iso-8859-1?Q?Re:_FYI:_Jarn_sprint_in_week_39_in_t=F8nsberg?= 

Regards,
Wichert.


-- System Information:
Debian Release: 5.0.2
  APT prefers stable
  APT policy: (990, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686-bigmem (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/bash

Versions of packages exim4 depends on:
ii  debconf [debconf-2.0]         1.5.24     Debian configuration management sy
ii  exim4-base                    4.69-9     support files for all Exim MTA (v4
ii  exim4-daemon-heavy            4.69-9     Exim MTA (v4) daemon with extended