Kjetil Torgrim wrote:
> why call it X-Received?
it was just as an example of something to identify messages allowed to
do this thing.
> you should not remove Received headers, these are used to stop mail
> loops. typically, when you reach 30 Received headers it will no longer
> be forwarded, so the loop stops. but since you remove all of those
> headers, the loop will continue forever.
> you'll get such a mail loop sooner or later, in the simplest case
> joedoe@yourdomain will forward to jonathan.doe@otherdomain, then forget
> about it and set up forwarding back to joedoe@yourdomain. that's all it
> takes for your bandwidth and CPU to be gobbled up.
well, in my case it is not a global politic for everybody but just an
option to hide the IP user in special accounts and neither for massive
mailing. Then I did not think in such forwards or in saturate the
queue. Just I think in answering some messages knowing that my
receiver cannot know if I'm in the office or not.
In the case that you explain, when I add an additional "Received: "
instead "X-Received:" and replacing the user IP with 127.0.0.1:
remote_smtp:
driver = smtp
headers_remove = Received:X-Special-Header
headers_add = ${if eq{$h_X-Special-Header:}{MYHEADER }
{Received: from [127.0.0.1] (helo=$sender_helo_name)\n\t \
by $primary_hostname with $received_protocol\n\t \
($tls_cipher) (Exim $version_number #$compile_number)\n\t \
id ${message_id} for $h_to } \
{Received: from $sender_rcvhost\n\t \
by $primary_hostname with $received_protocol\n\t \
($tls_cipher) (Exim $version_number #$compile_number)\n\t \
id ${message_id} for $h_to }}
also in dependence of X-Special-Header, a final "Received from:"
will be added at the final headers to preserve references and hiding
the user's IP. It would be more polite adding the header before the
From: To:. Maybe it is possible with a large replacement in all
headers to rebuild his appearance. However I don't need such thing
when it already works for my needs.
With # tail -f /var/log/exim_mainlog, I don't observe any loop testing
a reciprocal forwarding as you explain. Messages are dispatched and
received normally.
best regards,
