Date: Tue, 12 Oct 1999 13:07:25 -0500
From: mark david mcCreary <mdm@internet-tools.com>

Most modern email readers will now show any URL's in the body of an
email message as a clickable link.  AOL also does this, but needs the
URL to be in the HTML syntax.

The following configuration and program will allow messages going to
AOL only, to be filtered thru a Perl script.  This Perl script will
convert any URL's to the HTML syntax.

In addition, the transport will use VERP to send a unique envelope
sender with each message.

It is useful for mailing lists.



######################################################################
#                      TRANPORTS CONFIGURATION                       #
######################################################################

# This transport is used for delivering messages AOL messages one at a time
# It will put their email address in the To: line
# It will create a custom sender envelope address that will allow bounces
# to be easier to track.
#

aol_smtp:
  headers_remove =
"To:Message-Id:Resent-To:Resent-Date:Resent-From:Resent-Message-Id:Resent-Bcc",
add_headers = "To: $local_part@$domain\n\
  Message-Id:
<Epah${length_3:$local_part}${substr_17_2:$tod_log}${substr_14_2:$tod_log}${subs
tr_11_2:$tod_log}${length_3:$domain}\
  @$primary_hostname>",
  transport_filter = "/usr/local/bin/aol_transport_filter.pl",
  return_path = "${if match {$return_path}{^(.+?)-request@.*\\$}\
        {bounce-$1=$local_part=$domain@$primary_hostname}fail}",
  driver = smtp;
  max_rcpt = 1



######################################################################
#                      ROUTERS CONFIGURATION                         #
######################################################################

filter_msg_aol_domains:
   self = defer,
   driver = lookuphost,
   transport = aol_smtp,
   domains = "aol.com"








######################################################################
#          /usr/local/bin/aol_transport_filter.pl
######################################################################

#!/usr/bin/perl -w
#
#  This program will tweak the body of all email messages going to
#  America On Line (AOL).
#
#  It will change a plain text URL clause to an HTML version
#  since that is how the AOL email reader works.
#
#  For example,
#
#  http://commerce.internet-tools.com becomes
#
#  <A
HREF="http://commerce.internet-tools.com">http://commerce.internet-tools.com</A>
#
#  or also with the https, mailto, and ftp prefix
#
#


$/ = "";                    # set paragraph mode
chomp($headers = <STDIN>);  # read a paragraph, remove trailing newlines
$/ = "\n";                  # unset paragraph mode

printf(STDOUT "%s\n\n", $headers);

while (<STDIN>)
  {

s%\b((mailto:|((http(s?)|ftp)://)).*?)(?=(\s|:\s|\.\s|;\s|,\s|\?\s|!\s))%<A
HREF="$1">$1</A>%ig;
  print(STDOUT $_);
  }

exit;