Filtering Mailing List Traffic
If you're want an easy way to filter messages from the midrange.com mailing list processor, try creating a filter for the 'List-Id' header.
It will always contain the list name followed by the domain name. For example, the MIDRANGE-L list will contain 'midrange-l.midrange.com'.
How you implement this filter depends on your email software, of course.
Some mail systems, such as Gmail, have this functionality built in.