I have an internal machine which sends out newsletters for customers.
The software that's doing it is defaulting the envelope sender to
$USER@$HOSTNAME. It's in the process of being fixed, but in the
meantime, I wrote a couple of quick macros to set the return path
(rewriting the envelope sender). It works for all successful sends,
and most bounces. However there are a few bounces that don't seem to
ever get to the router because there is some basic thing wrong with
the email being sent (example below is a domain which exists but MX is
misconfigured, probably intentionally).
1. Successful sends and bounces for legit local and remote domains get
return path set properly.
2. Generic failures such as MX ends up with NSDOMAIN or points to IP
don't get return path set properly.
3. rewrite rule which rewrites www@internal_host_names to
www@??? *always* work properly.
4. This could also be something in my configs doing this, pipe up if
it looks obvious to you that's what is happening.
If I could get the rewrite rules (essentially sets $sender_address
from my understanding) to expand the macro shown below, I think I
would be golden, but in my testing it didn't work. In anybody's
authoritative opinion, should it work and I just did not test
properly? Or is that strictly static mappings, and not expandable (or
I'm accessing variables that aren't yet set)?
=================begin bounce quote ==========
redden@???
all relevant MX records point to non-existent hosts
------ This is a copy of the message, including all the headers. ------
Return-path: <www@???>
Received: from ivut53.ivenue.net
by m.ivenue.com with esmtps (TLSv1:AES256-SHA:256)
(Exim 4.74)
(envelope-from <www@???>)
id 1Pp3Bv-0004CS-07
for redden@???; Mon, 14 Feb 2011 18:30:33 +0000
================end bounce quote ===========
================begin exim.conf quote ===========
HDR_RETURN_PATH = ${lc:${addresses:>, $h_from:}}
DFLT_RETURN_PATH = ${if eq{HDR_RETURN_PATH}{}
{$sender_address}{HDR_RETURN_PATH}}
SET_WWW_RETURN_PATH = ${if eq{${lc:$sender_address_local_part}}{www}
{DFLT_RETURN_PATH}{$sender_address} }
router---
dnslookup_iv_hosts:
debug_print = "Router: dnslookup_iv_hosts for $local_part@$domain"
driver = dnslookup
domains = ! +local_domains
transport = remote_smtp_iv_hosts
condition = ${if eq {$acl_c_iv}{1} {yes}{no} }
errors_to = SET_WWW_RETURN_PATH
no_more
cannot_route_message = Domain of sender ($domain) not found in DNS
transport---
remote_smtp_iv_hosts:
debug_print = "Transport: remote_smtp_iv_hosts for $local_part@$domain"
driver = smtp
max_rcpt = 10
hosts_max_try = 2
return_path = SET_WWW_RETURN_PATH
# ivwm51-local.ivenue.net
interface = 10.1.2.201
helo_data = "out.system.iv.ivenue.com"
.include_if_exists /etc/exim/dkim_transports.conf
rewrite---
www@*.ivenue.net www@??? E
=================end exim.conf quote ========
--
Regards... Todd
I seek the truth...it is only persistence in self-delusion and
ignorance that does harm. -- Marcus Aurealius
