I wanted to reply to my own question with the final answer that seems to
work. After a bit of testing and tweaking, here are the transport and
router that will allow users to have a Subject: line in their
.vacation.msg file. Thanks to Ian's suggestions, auto-replies from this
router should be rfc3834 and rfc2047 compliant.
vacation_router:
driver = accept
check_local_user
user = ${lc:$local_part}
domains = +local_domains
require_files = ${home}/.vacation.msg
address_data = ${readfile{${home}/.vacation.msg}}
# See Exim autoreply wiki for list of senders that we don't auto-reply to.
senders = !+noautoreply_senders
# do not reply to errors or lists
condition = ${if or { \
<snip> See
http://wiki.exim.org/EximAutoReply?highlight=%28CategoryHowTo%29 for an
example list
no_expn
transport = vacation_transport
unseen
no_verify
vacation_transport:
driver = autoreply
user = ${lc:$local_part}
mode = 700
log = ${home}/.vacation.log
once = ${home}/.vacation.db
once_repeat = 7d
from = $local_part@$domain
to = $sender_address
subject = ${if match {$address_data}{\N(?i)^subject:\s+(\w+.*)\n(.*)\N}\
{Auto: ${rfc2047:${escape:${length_60:$1}}}}\
{Auto: Re: ${rfc2047:${escape:${length_60:$h_subject:}}}}}
text = ${if match {$address_data}{\N(?i)^(subject:\s+\w+.*\n).*\N}\
{${sg {$address_data}{$1}{}}}\
{$address_data}}
In order for the senders = !+noautoreply_senders bit to work, I have
"addresslist noautoreply_senders = /etc/exim/autorep.noanswer" in the
main section of my config, and the autorep.noanswer file is populated
with the list mostly lifted from the autoreply wiki.
Matt
