On 11/20/2017 11:44 AM, Mengxuan Xia wrote:
A common feature in modern Email client is to allow users to unsubscribe in one line. This works by sending a email titled "unsubscribe" to the listserv, which most listserv these days are able to understand and unsubscribe the user.
thats a feature of many email list SERVERS, not the email clients. Mailman in particular looks for the major command keywords in the first few lines of the email, and will respond to them, even if they are sent to the regular list address instead of the command address.
-- john r pierce, recycling bits in santa cruz
