Presuming that this is the Blind-X list that one subscribes to via sending an e-mail message to listserv@...  [listserv at maelstrom dot stjohns dot edu],  one can unsubscribe by sending a message to said address with the subject blank and the message body reading: 
        unsubscribe blind-x
from the e-mail address you used to subscribe.  I would imagine that there exist options to get daily digests instead of individual messages, but I can't find that with a quick web search.
--

Brian - Windows 10 Home, 64-Bit, Version 1803, Build 17134  

     Explanations exist; they have existed for all time; there is always a well-known solution to every human problem — neat, plausible, and wrong.

          ~ H.L. Mencken, AKA The Sage of Baltimore