The header for --set-param must exist

[mimedecode.git] / mimedecode.py

diff --git a/mimedecode.py b/mimedecode.py
index 70776d3d1401bb3c39d31ef512ff853a2265d0d4..50bdcd4fe2adbc583e778cc0e839ebe0f14be0fc 100755 (executable)
--- a/mimedecode.py
+++ b/mimedecode.py
@@ -500,7 +500,8 @@ if __name__ == "__main__":
         msg[header] = value
 
     for header, param, value in gopts.set_header_param:
-        msg.set_param(param, value, header)
+        if header in msg:
+            msg.set_param(param, value, header)
 
     try:
         decode_message(msg)