Logging simplified

This isn't catching the exception, just logging before exiting.

docs/courier-to-mailman3.md

@@ -30,3 +30,4 @@ This is our current version trying to communicate between courier and mailman3.
 * Logging host and port on same line.
 * OK, parsing port number, and setting default.
 * Logging error (I hope), when lmtp fails to be created.
+  * Maybe this is better?  

source/courier-to-mailman3.py

@@ -65,6 +65,7 @@ try:
         # 5xx error
         else:
             raise
-except smtplib.SMTPEXception as e:
-    logger.error('lmtp failed errorno: %s, message: %s', e.errno, e.strerror)
+except:
+    logger.error('lmtp error')
+    #logger.error('lmtp failed errorno: %s, message: %s', e.errno, e.strerror)
     exit(100)