At 09:14 pm 8/8/96 -0700, Alan Stebbens <stebbens(_at_)sgi(_dot_)com> spake:
If your MUA is not so flexible, then you should see if your MTA is
configurable. Most Unix system's support sendmail which is very
configurable, albeit obscurely. It is not too difficult to modify
sendmail.cf to insert rewrite rules for outgoing addresses such that the
mail is filtered before being sent. See the procmail distribution
"examples" directory for hints.
I'm using sendmail 8.6.12 and I have procmail installed as my MDA
in place of deliver. I have procmail installed according to the
instructions (and I know it's working, because my .procmailrc file
is working without a .forward). It's running on a Linux box. I use
Eudora on my PC to write my mail, and it sends it to my Linux box
with SMTP (sendmail). So, given that configuration, how do I get
procmail to intercept the outgoing messages so I can process them?
You covered the _incoming_ side of the transport process, but not
the _outgoing_ side.
The delivery is controlled by the "Mlocal" definition; the outgoing
transport filtering is controlled by special rules in the Mtcp, Muucp,
or Mether definition (whatever outgoing mailer is used in yoiur
config).
As I said before, see the examples, especially in the procmail(1) man
page; the four paragraphs below are straight from the manual:
procmail(1):
The -m option is typically used when procmail is called
be able to do this it is convenient to create an extra
`procmail' mailer in your sendmail.cf file (in addition to
the perhaps already present `local' mailer that starts up
procmail). To create such a `procmail' mailer I'd suggest
something like:
Mprocmail, P=/usr/local/bin/procmail, F=mSDFMhun, S=11, R=21,
A=procmail -m $h $g $u
This enables you to use rules like the following (most
likely in ruleset 0) to filter mail through the procmail
mailer (please note the leading tab to continue the rule,
and the tab to separate the comments):
R$*<@some.where>$*
$#procmail $@/etc/procmailrcs/some.rc
$:$1(_at_)some(_dot_)where(_dot_)procmail$2
R$*<@$*.procmail>$*
$1<@$2>$3 Already filtered, map back
Of course, you have to figure out where and how to trigger the rewrite
rule to invoke the "some.rc" filter file. The example above triggers
based on the domain of "some.where"; you could, instead, have it
trigger on a particular set of users (logins).
Just be sure to avoid looping.
G'luck.
_____________________________________________________________________
Alan Stebbens <stebbens(_at_)sgi(_dot_)com> (415) 933-6437
Digital TV, Silicon Interactive Group, Silicon Graphics, Inc. (SGI)
M/S:9L991, 2011 N. Shoreline Blvd., Mountain View, CA 94043
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