Make sure that the user from whose account you are sending the file is a member of the records Center Submitters group in the records center site. The document library you create in the records center can be any name. It does not have to match the name of the content type of the file. That way, you can route many types of documents to the same library using a single routing table entry. Just add the content type names to the "Aliases" field of the record routing entry.