Sorry to bother everyone, but I'm trying to set up a filter per Tim's suggestion. If it works, I should be able to see this message. I tried the instructions from https://productforums.google.com/forum/?hl=en#!category-topic/gmail/computer... Not working. The following is what I have as shown in Settings->Filters and Blocked Addresses Matches: from:(bill.jemison@gmail.com via mailman.xmission.com OR to:fractint@mailman.xmission.com) Do this: Categorize as Forums Any Gmail filter gurus out there that can spot my error(s)?