diff --git a/docs/courier-to-mailman3.md b/docs/courier-to-mailman3.md
index 91ac0bd..13959a6 100644
--- a/docs/courier-to-mailman3.md
+++ b/docs/courier-to-mailman3.md
@@ -27,4 +27,5 @@ This is our current version trying to communicate between courier and mailman3.
   * Level and File set in variable
   * Format had errors with `$` used instead of `%`
 * Clean up logging to not log what was logged for logging diagnostics.
-* Logging host and port on same line.
\ No newline at end of file
+* Logging host and port on same line.
+* OK, parsing port number, and setting default.
\ No newline at end of file
diff --git a/source/courier-to-mailman3.py b/source/courier-to-mailman3.py
index 19d1946..5ec8a94 100644
--- a/source/courier-to-mailman3.py
+++ b/source/courier-to-mailman3.py
@@ -31,11 +31,12 @@ try:
 
     # Setup LTMP connection 
     lmtp_host = sys.argv[3] if len(sys.argv) > 3 else 'localhost'
-    logger.info('lmtp_host: %s lmtp_port: %s', lmtp_host, sysv.arg[1])
+    lmtp_port = sys.argv[1] if len(sys.argv) > 1 else 8024
+    logger.info('lmtp_host: %s lmtp_port: %s', lmtp_host, lmtp_port)
     # class smtplib.LMTP(host='', port=LMTP_PORT, local_hostname=None, source_address=None)
-    logger.info('lmtp_port: %s', sysv.arg[1])
-    lmtp = smtplib.LMTP(lmtp_host, int(sys.argv[1]))
-    logger.info('lmtp_port (lmtp setup): %s', sysv.arg[1])
+    logger.info('lmtp_port: %s', lmtp_port)
+    lmtp = smtplib.LMTP(lmtp_host, int(lmtp_port))
+    logger.info('lmtp_port (lmtp setup): %s', lmpt_port)
 
     try:
         # Unfortunately qmail sends to local bare LF for end line, while