--- /dev/null
+# Exim Filter
+# /org/packages.debian.org/mail/.forward-default
+
+# This filter looks up the package name in the maintainer database, if it is
+# not found then a bounce message is generated. Although the docs say you
+# can put spaces in the $lookup stuff you can't, don't try it.
+if ${lookup{${local_part}}lsearch{/org/packages.debian.org/files/maintainerdb}{$value}{unknown}} is "unknown"
+then
+ save /dev/null
+else
+ seen deliver ${lookup{${local_part}}partial-lsearch{/org/packages.debian.org/files/maintainerdb}{$value}}
+endif
+