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From: chip@tct.com (Chip Salzenberg)
Newsgroups: comp.mail.uucp
Subject: Re: How to use Batch SMTP with Smail 3.1
Message-ID: <286668DA.44C0@tct.com>
Date: 24 Jun 91 21:49:14 GMT
References: <1084@camco.Celestial.COM> <28609F47.1E0D@tct.com> <EMV.91Jun21004543@bronte.aa.ox.com>
Organization: TC Telemanagement, Clearwater, FL
Lines: 76

According to emv@msen.com (Ed Vielmetti):
>Chip, could you give a tutorial on compressed batched SMTP?

Thumbnail sketch of Batch SMTP for Smail 3.1 users:

Somehow arrange to use the "hbsmtp" (Half-baked BSMTP) transport for
those sites to which you wish to send SMTP.  (Half-baked BSMTP is SMTP
without the HELO/QUIT wrapper.)  Your "transports" entry for "hbsmtp"
might look something like this:

  # hbsmtp - write half-baked batch SMTP to a spool file
  hbsmtp: driver = appendfile,		# append to spool file
	hbsmtp,				# send half-baked batch SMTP commands
	uucp,				# write envelope address as bang path
	-max_addrs,			# there is no limit on the number or
	-max_chars;			#  total size of recipient addresses.

	dir = /usr/smail/spool/outq/$host,  # location of spool files
	user = root,			# user to own spool files
	mode = 0600			# only owner can read and write file

This transport arranges for each message to the given host(s) to be
written to a file with a unique name (which always begins with "q"),
in the directory /usr/smail/spool/outq/hostname.

Then, once in a while (I use once an hour), you run this script:

    : sendbsmtp
    # Send all batch SMTP traffic

    SPOOLDIR=/usr/smail/spool/outq
    # HOST="`uuname -l`.uucp" || exit 1
    HOST="your.domain.here"

    cd $SPOOLDIR || exit 1

    for d in *
    do
	test -d $d || continue

	(
	  cd $d || exit

	  f="`ls q* 2>/dev/null`"
	  test -n "$f" || exit

	  (
	    echo "HELO <${HOST}>"
	    cat $f
	    echo "QUIT"
	  ) | /usr/bin/uux -r - "$d!rsmtp" && rm -f $f
	)
    done

This script concatenates all the the half-baked SMTP files in each
host's directory, turns it into real BSMTP with leading HELO and
trailing QUIT lines, and feeds it into a remote execution of the
"rsmtp" command.

Note that I do not use compression on my BSMTP.  To add compression,
you change the uux line in the "sendbsmtp" script to something like:

	  ) | compress | /usr/bin/uux -r - "$d!rcsmtp" && rm -f $f

Note that the command is now "rcsmtp".  Then, on the *other* system,
arrange for this script to be executable under the name "rcsmtp":

    : rcsmtp
    # Receive compressed BSMTP.
    uncompress | rsmtp

That should be clear as mud.  Questions?
-- 
Chip Salzenberg at Teltronics/TCT     <chip@tct.com>, <uunet!pdn!tct!chip>
 "I want to mention that my opinions whether real or not are MY opinions."
             -- the inevitable William "Billy" Steinmetz