--- /dev/null
+# exim filter
+
+logfile DIR/spool/log/mainlog
+logwrite "Filter entered: original_local_part=$original_local_part"
+logwrite " parent_local_part=$parent_local_part"
+
+if
+ $local_part_prefix is "" and $local_part_suffix is ""
+then
+ logwrite "No prefix or suffix"
+else
+ logwrite "Prefix=$local_part_prefix"
+ logwrite "Suffix=$local_part_suffix"
+endif
+
+deliver $local_part