The listname is actually part of the PUT command at the top of the list, and not really a part of the list header. This needs to be a valid internet style e-mail address and the person's name. This is the e-mail address of the person, or people, that receive the posts from other people and then submit them to the list for distribution. As with the owner, this needs to be a valid internet style e-mail address and the person's name. Who can look at who is subscribed to the mailing list.
Frequency means how often to start a new file.
Each subscriber can then decide on their own whether they would prefer to get their posts via individual mail messages or as in digest format. Don't use a number greater than 28. If the gets over this limit, the subscribers will get 2 digests on that day. The value to be placed in the e-mail header sent out with posts. This value can automatically cause their replies to go to the original poster, back to the list, or both.