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From: JSOL%BUCS20%bostonu.csnet@CSNET-RELAY.ARPA (Jon Solomon)
Newsgroups: net.mail.headers
Subject: Sendmail munges addresses containing dollar signs.
Message-ID: <1365@brl-tgr.ARPA>
Date: Sun, 8-Sep-85 13:19:05 EDT
Article-I.D.: brl-tgr.1365
Posted: Sun Sep  8 13:19:05 1985
Date-Received: Wed, 11-Sep-85 07:03:51 EDT
Sender: news@brl-tgr.ARPA
Lines: 23

You probably can't get the sendmail.cf file to deal with this, as it
is the primary reason for the $'s existance in the parsing rules. Like
any "quote character", sending two of them generally allows one to
pass through. You will probably have to modify the source to sendmail
(if you have it) to explicitely copy the To: field byte by byte, adding
an extra $ for each $ encountered. Such a fix is trivial:

fix_to_line(to_line)
char *to_line;
{
	char line[MAX];
	int i, len, j = 0;

	len = strlen(to_line);
	for (i = 0; i < len; i++) {
		if (to_line[i] == '$')
			line[j++] = '$';
		line[j++] = to_line[i];
	}
	return(&line);

Cheers,
--JSol