For additional information on the different commands you can use for a list, you can send a message to the listserv address and in the text of the message, type help. The other address is for posting messages to the list. I refer to this one as the mailing list address. Messages to this address are sent to people, everyone that is subscribed to the list. You do not want to send a subscription request to the address that posts messages to the list.
Some lists have a lot of mail.
Some listservs have an option that can you help you deal with this, if you don't want to be receiving so many messages. If the listserv supports this option, you will receive a message once a day. The daily index message includes the individual message file number, subject, name of the person who posted and the date. To receive the desired individual messages, forward this indexed message back to the listserv. At the bottom of the message, it is already programmed to search the computer.