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From: sean@dmr.asa.com (Sean Baker)
Newsgroups: comp.mail.mh
Subject: Re: Checking if recipient is on To: or Cc: list
Message-ID: <394.675710593@smb>
Date: 31 May 91 17:23:13 GMT
Sender: rwh@ucbvax.BERKELEY.EDU
Reply-To: sean@dmr.asa.com
Organization: The Internet
Lines: 79


    Sean,
    
    In your letter dated Thu, 30 May 91 12:58:14 PDT, you wrote:
    >I'm trying to do some maildelivery stuff, and I have a
    >function that I'd like to perform only if the recipient is
    >in the To: list of addresses.
    
    So why not use
    
    To	foo			file	?	mail/foo
    
    >If I have not made myself clear as to what I'm asking, please let me know
    >and I'll try to clarify.
    
    Please do.  Regards, Neil.

Neil,

In a way, this would work.  But, ideally, this is what I
would like to do:

Have an entry in the .maildelivery file that says:

	X-Testheader "doprogram" pipe R "program"

So, if a message comes in with the following header:

	X-Testheader: doprogram nocc

The program would run, parse the X-Testheader body, and find
the "nocc" directive.  The program would then figure out if
the user is in the To: or Cc: list.  In this case, if the
user is on the To: list, no problem.  If the user is on the
Cc: list, the program would exit.

If the header were this:

	X-Testheader: doprogram cc

and the user is on the Cc: list, the program would run
normally.  In other words, I'd be sending this message out
to many users, but I want to be able to say "run this
program for the people on the To: list only", or, "run this
program for every recipient."

So, the question is, is there a reliable way for
the program to figure out if the user is on the To: or Cc:
list?  So far, I'm inclined to say no, simply because the
actual address text in the To: and Cc: lines could be almost
anything.  E.g., I get messages where my address is: 

	Sean Baker <S-Baker@DMR.ASA.COM>
	S-Baker@DMR.ASA.COM
	S-Baker <sean@DMR.ASA.COM>
	sean@DMR.ASA.COM
	Sean M. Baker <sean@DMR.ASA.COM>
	smb@DMR.ASA.COM

All of which are accepted because of aliasing (I'm using
MMDF as the MTA, by the way).  From the looks of these
addresses, there doesn't seem to be a reliable way to do
what I want to do.

However, I think I may be able to use your example to get
the job done, by using the following:

	To  foo  pipe  R  "program to"
	Cc  foo  pipe  R  "program cc"

And then let the program check the X-Testheader: header for
the "doprogram" directive.  The only problem with this is
that I'd be piping every message I receive into the program.

Any other suggestions or comments are welcome.

Thanks for your help,

Sean.