Types of List-Server Mailing Lists

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Mail that is received by a list-server mailing list and re-sent to the list subscribers is "posted." Those who can post to a particular list are determined by the type of list. There are three types of basic lists. (The list type is set on the Security tab of the list properties.)

• Open lists (to which anyone can post a message; the poster need not even subscribe to the list)
• Subscriber lists (to which only subscribers can post)
• Moderated lists (to which only the list owner can post)

Using Passwords and Posters Lists

The posting of messages to each type of list can be further restricted by enabling one or both of the following:

• A password requirement (See "Using a Password".)
• A posters list

If a password or posters list is enabled, anyone not using the password and/or listed in the posters list will have their mail returned. The list owner (or moderator) is also notified of the attempt to post.

Note: If there are only a few individuals who you want to post to the list, you can simply give those few the appropriate password. However, if there are more than a few individuals who are to be allowed to post to the list, it may be more efficient to use a "posters" list.

Open Lists (Anyone Can Post)

The characteristics of an open list are the following:

• Anyone can post to the list by sending a message to an address in the form of listname@domain.com if Use Password and Enable Posters List are turned off.
• If Use Password is turned on, only those with the password can post. (See "Using a Password".)
• If Enable Posters List is turned on, only those in the posters list can post.
• If both Use Password and Enable Posters List are turned on, the poster must use the password and be in the poster list.

Subscriber Lists

The characteristics of a subscriber list are the following:

• The list is made up of subscribers. An individual becomes a subscriber by sending a message addressed to the IMail list server (imailsrv@domain.com where domain.com represents the mail host); in the body of the message, the intended subscriber enters the subscribe command and the list name. For more information, see "Requesting Information and Subscribing".
• Subscribers can post by addressing a mail in the form of listname@domain.com if Use Password and Enable Posters List are turned off.
• If Use Password is turned on, only subscribers with the password can post. (See "Using a Password".)
• If Enable Posters List is turned on, only subscribers in the posters list can post.
• If both Use Password and Enable Posters List are turned on, the subscriber must use the password and be in the poster list in order to post.

Moderated Lists

The characteristics of a moderated list are the following:

• The moderator can post by sending a message to an address in the form of listname@domain.com if Use Password and Enable Posters List are turned off.
• If Use Password is turned on, the moderator must enter a password in order to post to the list. This prevents others from "impersonating" the moderator by using the moderator's mailing address. (See "Using a Password".)
• If Enable Posters List is turned on, the moderator receives only mail from those in the posters list.
• If both Use Password and Enable Posters List are turned on, the moderator receives only mail from those in the posters list, and the moderator must enter a password in order to post to the list.

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