diff --git a/config.sample/IP b/config.sample/IP
new file mode 100644
index 0000000..360c58e
--- /dev/null
+++ b/config.sample/IP
@@ -0,0 +1,4 @@
+0 
+# the first line of this file is being used as the IP 
+# address tcpserver will bind to.  Use 0 to bind to all
+# interfaces.
diff --git a/run b/run
index 6356496..aab7fb6 100755
--- a/run
+++ b/run
@@ -3,6 +3,6 @@ QMAILDUID=`id -u smtpd`
 NOFILESGID=`id -g smtpd`
 exec /usr/local/bin/softlimit -m 10000000 \
   /usr/local/bin/tcpserver -c 10 -v -p \
-  -u $QMAILDUID -g $NOFILESGID 64.81.84.165 smtp \
+  -u $QMAILDUID -g $NOFILESGID `head -1 config/IP` smtp \
   ./qpsmtpd 2>&1