diff --git a/README.md b/README.md
index 0c6d34c..6c671de 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,20 @@
 Simple python script to send email with attachments from the command line
+
+usage: mailex.py [-h] [-v] -t TO_ADDRESS [-f [FROM_ADDRESS]] [-a ATTACHMENTS]
+                 [-s [SUBJECT]] [-b [MAIL_BODY]]
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -v, --version         show program's version number and exit
+  -t TO_ADDRESS, --to-address TO_ADDRESS
+                        To address
+  -f [FROM_ADDRESS], --from-address [FROM_ADDRESS]
+                        From address
+  -a ATTACHMENTS, --attachments ATTACHMENTS
+                        File(s) to attach
+  -s [SUBJECT], --subject [SUBJECT]
+                        Mail subject
+  -b [MAIL_BODY], --mail-body [MAIL_BODY]
+                        Mail body
+fergalm@FERGAL-NIX-LT ~/Dropbox/Private/mailex $ 
+
diff --git a/mailex.py b/mailex.py
index f1603b0..fff8281 100755
--- a/mailex.py
+++ b/mailex.py
@@ -41,18 +41,18 @@ def _get_default_from():
     return "%s@%s" % (getpass.getuser(), socket.gethostname())
 
 if __name__ == "__main__":
-    parser = argparse.ArgumentParser()
+    parser = argparse.ArgumentParser(description='Sends email, inclucing attachments, from the command line')
     #commands
     parser.add_argument("-v", "--version", action="version", version="0.1")
 
     #required
-    parser.add_argument("-t", "--to-address", help="To address", required=True)
+    parser.add_argument("-t", "--to-address", metavar="TO", help="To address", required=True)
 
     #optional
-    parser.add_argument("-f", "--from-address", nargs="?", default=_get_default_from(), help="From address")
-    parser.add_argument("-a", "--attachments", help="File(s) to attach")
-    parser.add_argument("-s", "--subject", nargs="?", help="Mail subject", default="")
-    parser.add_argument("-b", "--mail-body", nargs="?", help="Mail body", default="")
+    parser.add_argument("-f", "--from-address", metavar="FROM",  default=_get_default_from(), help="From address")
+    parser.add_argument("-a", "--attachments", nargs="?", help="File(s) to attach")
+    parser.add_argument("-s", "--subject", metavar="SUBJ", help="Mail subject", default="")
+    parser.add_argument("-b", "--mail-body", metavar="BODY", help="Mail body", default="")
     args = parser.parse_args()
 
     #read any piped text