Update app.py

app.py

@@ -241,9 +241,12 @@ def main():
     if st.button("Send Email"):
         remail=email.strip()
         msg = ' '.join(map(str, pred))
-        send_brevomail(remail,msg,strtime)
-        time.sleep(2)
-        st.success("Have a Great Day !")
+        if msg is null:
+            st.error("Message Body is Null")
+        else:
+            send_brevomail(remail,msg,strtime)
+            time.sleep(2)
+            st.success("Have a Great Day !")
 
 if __name__ == '__main__':
     main()