Yet, absent rules governing particular lists, I am unaware of any legal basis for it. Beyond that, few who post to email lists would object if their messages are forwarded to others apt to be interested. In the same vein, it seems unlikely that many authors would object to having messages archived, perhaps on a web page. That serves the interests of list members who may want to revisit topics addressed earlier. Circumstances allowing that seem rare.
Courts are, at best, reluctant to allow someone to impose a difficult burden on others.
Email authors should be careful. Worse, it may well be impossible to recall inadvertent postings after distribution. A brief sample appears below. Members who post to this list retain their copyright but give a non-exclusive license to others to forward any message they post. They also give the list owner the right to archive or approve the archiving of list messages.