diff -u orig/spamass-milter.1.in spamass-milter.1.in
--- orig/spamass-milter.1.in	Thu Mar 18 10:37:08 2004
+++ spamass-milter.1.in	Wed Oct 18 18:06:23 2006
@@ -199,6 +199,9 @@
 Requires the
 .Fl u
 flag.  
+.It Fl a
+Causes spamass-milter to pass through unchecked any messages from connections
+established using SMTP authentication.  This is useful for sites with remote users.
 .It Fl - Ar spamc flags ...
 Pass all remaining options to spamc. 
 This allows you to connect to a remote spamd with
diff -u orig/spamass-milter.cpp spamass-milter.cpp
--- orig/spamass-milter.cpp	Thu Mar 23 13:41:36 2006
+++ spamass-milter.cpp	Wed Oct 18 21:13:25 2006
@@ -170,6 +170,7 @@
 bool flag_full_email = false;		/* pass full email address to spamc */
 bool flag_expand = false;	/* alias/virtusertable expansion */
 bool warnedmacro = false;	/* have we logged that we couldn't fetch a macro? */
+bool auth = false;		/* don't scan authenticated users */
 
 #if defined(__FreeBSD__) /* popen bug - see PR bin/50770 */
 static pthread_mutex_t popen_mutex = PTHREAD_MUTEX_INITIALIZER;
@@ -196,6 +197,9 @@
 	/* Process command line options */
 	while ((c = getopt(argc, argv, args)) != -1) {
 		switch (c) {
+			case 'a':
+				auth = true;
+				break;
 			case 'f':
 				dofork = true;
 				break;
@@ -281,7 +285,7 @@
       cout << "SpamAssassin Sendmail Milter Plugin" << endl;
       cout << "Usage: spamass-milter -p socket [-b|-B bucket] [-d xx[,yy...]] [-D host]" << endl;
       cout << "                      [-e defaultdomain] [-f] [-i networks] [-m] [-M]" << endl;
-      cout << "                      [-P pidfile] [-r nn] [-u defaultuser] [-x]" << endl;
+      cout << "                      [-P pidfile] [-r nn] [-u defaultuser] [-x] [-a]" << endl;
       cout << "                      [-- spamc args ]" << endl;
       cout << "   -p socket: path to create socket" << endl;
       cout << "   -b bucket: redirect spam to this mail address.  The orignal" << endl;
@@ -302,6 +306,7 @@
       cout << "   -u defaultuser: pass the recipient's username to spamc.\n"
               "          Uses 'defaultuser' if there are multiple recipients." << endl;
       cout << "   -x: pass email address through alias and virtusertable expansion." << endl;
+      cout << "   -a: don't scan messages over an authenticated connection." << endl;
       cout << "   -- spamc args: pass the remaining flags to spamc." << endl;
               
       exit(EX_USAGE);
@@ -782,6 +787,15 @@
     return SMFIS_TEMPFAIL;
   }
   /* debug(D_ALWAYS, "ZZZ got private context %p", sctx); */
+
+  if (auth) {
+    const char *auth_type = smfi_getsymval(ctx, "{auth_type}");
+
+    if (auth_type) {
+      debug(D_MISC, "auth_type=%s", auth_type);
+      return SMFIS_ACCEPT;
+    }
+  }
 
   debug(D_FUNC, "mlfi_envfrom: enter");
   try {