Very Computer

        HELP!, I'm being attacked by sendmail.cf on the host that
forwards me E-Mail!

        Situation:

        We/I run Smail 3.1.25 which apparently does everything
correctly for the addressing sending it to the other host.

        The other host is a Sun SparcStation 2 running the Sendmail
bundled with 4.1.2 SunOS...  Here is the problem...

        Mail comes back to me mangled with "host!ourhost!user"
addressing in the "From: " line.

        It has been determined via the following procedure that the
addressing is being handled incorrectly by the other host.

        I had the system administrator send me E-mail from the other
host, and also a uustat, and a cat of the mail that was queued up for

passed to rmail for delivery to my machine, and it was reflected in
the uustat.

        However, sendmail generated "!" path addressing in the "From:
" line from that host!

        My question is, since I've been trying to get this resolved
for the past 6 months, where do I have to tell the other guy to look
to correct the problem in his "sendmail.cf", or whatever!

        HELP!

        Thanks in advance...

--
-------------------------------------------------------------------------------

Karl J. Vesterling                      |       it.

I am assuming that this is a UUCP connection, which is what it sounds like.

UUCP-style addresses when it gets to your machine.  You can attack this at
either your machine, or the other one.  What I did was added an additional
mail and two rulesets for a smart UUCP host that can handle DNS addresses.

I did this by adding the following mailer spec:

Msmartuucp,     P=/usr/bin/uux, F=CmsDFMhuU, S=15, R=25, M=100000,
        A=uux - -r -gC $A!rmail ($u)

And then followed with rulesets 15 and 25, which call the S= and R= rulesets
of my tcp mailer.  In my case, those are rules 14 and 24, respectively:

S15

S25

One other possible hitch:  on my system, uux would complain that the resulting
DNS address was not uucp-style.  So, my ruleset 15 is really as below.  What I
do is append the UUCP hostname (in $A with DA____).  This is okay, because the
UUCP host will strip it's host name off the front, leaving the valid DNS spec.

S15
R$+             $:$>14$1             start with same as tcp mailer
R$+             $:$A!$1                 prefix with "host!"
--

    Kastle Development Associates                   ...!uunet!friend!todd
        Arlington, VA, USA

Msmartuucp,     P=/usr/bin/uux, F=DFMhu, S=28, R=29, M=100000,
                A=uux - -r -gC $h!rmail ($u)

I don't know the meanings of all these 'F'lags, but I'm quite sure that
the absence of the flag 'U' is the reason why my smart mailer doesn't
complain about DNS addresses.

regards,
Thomas

PS:
Rules S28 S29:

S28

S29
# empty

--
  Thomas Wolfram, European Advanced Networking Test Center
  (Process Computing Center, Technical University of Berlin)
  Strasse des 17.Juni 135, 1000 Berlin 12, Germany