all of these are up to the list. various policies spam: some run filters on the list, some let it through banning: some lists are moderated where posts go thr

all of these are up to the list. various policies spam: some run filters on the list, some let it through banning: some lists are moderated where posts go through moderators, some are not, ban tendency is up to the list administrator archives: some listserve software has built in archives, other people run add-on web applications, others dont archive at all. see also https://en.wikipedia.org/wiki/List_of_mailing_list_software https://en.wikipedia.org/wiki/List_of_mailing_list_software , etc.