Hi Scott,
and hello to everybody else, because this is my first post here :-)
My XMail also uses a Windows machine and I use custom filters for
several things. It's easier than it seems: You can use every script that
your windows machine can parse and even executables if they give back
their results using STDOUT (command line style).
I have used VB Script, WSH and even .NET command line executables. An
example:
My filter.post-data.tab has a line:
"d:\MailRoot\filters\RecipientFilter\RecipientName.exe" "@@FILE"
"@@FROM" "@@CRCPT" "@@USERAUTH" "@@REMOTEADDR"
RecipientName.exe is my .NET command line executable, which parses the
incoming parameters and logs the sender/recipient and headers of
incoming and outgoing mails to a mySQL database. It was a simple VB
Script before I decided to use an executable to have something I can
properly debug. ;-)
Additionally, my filter can reject a message without sending a
notification/bounce to the sender. You can do this by simply returning
'3' from the filter. If you add '16' to the return value, so you get
'19', you can stop processing of any following filters in filter*.tab file.
From Xmailserver README.TXT:
Filter commands have the ability to inspect and modify the content of
the message (or info) file. The exit code of commands executed by XMail
are used to tell XMail the action that has to be performed as a
consequence of the filter. The exit code is composed by a raw exit code
and additional flags. Currently defined flags are:
'16' Stop selected filter list processing.
Currently defined raw exit codes are:
'3' Reject the message.
When rejecting the message, the filter command has the ability to
specify the SMTP status code that
XMail will send to the remote SMTP client, by creating a file named
$(FILE).rej containing the message
in the very first line. Such file will be automatically removed by XMail.
See MESSAGE FILTERS section for further details.
Regards,
Mathias Wührmann
FLEXact
Scott schrieb:
Hi,
Since there is no facility within XMail to prevent all
bounce-messages, I need a filter, script or something that will do it
for us.
Any tips/pointers on where to start are appreciated (not sure the best
way to do it). Unfortunately the PHP based script/filter on the XMail
forums does not appear to work for us. It's a Windows box with
ActivePerl installed, so any default 'Windows script' or Perl would be
fine to use.
I hope that it should not be too hard to do - check all outbound mail
and if the sender is the local server and the subject contains "Error
sending Message" to drop the mail.
The adverse consequences of "Poor" reputation on SenderBase, due to
the server(s) bouncing NDR messages (spam bouncing to spoofed
addresses) is far greater than missing a few valid 'Error sending
message' may be generated. Not being able to send/receive email
to/from the largest companies and ISP's in the country, does not
compare to the the handful of of legitimate 'Mail box full' messages
that would otherwise be useful. Our servers are not used for spam and
SenderBase have confirmed that the bounced NDR's are the cause of the
problem, so we need a way to stop them.
Thanks for any help and pointers.
Regards,
Scott
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