To post a message on the mailing list, the author should send it to the listname@domain address.
This setting specifies who can post messages on this mailing list:
from owner only: Only messages submitted by the list owner (using any authenticated method) will be posted.
Moderated: Messages from everybody but the list owner are redirected to the list owner for approval; if the list owner redirects a message back to the list, the message is posted. Note: this mode can be used to change the list posting policy when the list owner wants to postpone all postings. If you use the from subscribers mode, the New Subscribers setting (see below) provides more advanced moderation options.
from subscribers: Messages from the list subscribers are accepted for posting; some messages can be moderated (see below).
from anybody: Messages from any address are accepted for posting.
This setting is effective only if the Accept Postings setting is set to from subscribers. When a user subscribes and starts to post messages, the messages are stored in the list owner Mailbox waiting for approval. After the specified number of messages is approved and posted, all messages sent by this user are posted on the list directly, without the list owner approval. Note:** this is a very effective way to enforce the list policies and to protect the mailing list from "spamming".** If you set this option to Moderate All, then all messages from new subscribers will be stored for approval (the LIST module will not update the posted messages counter). If you set this option to Prohibited new subscribers won't be able to post on the list (their postings will be rejected). If you set this option to Special, new subscribers will be able to post auto-generated messages. This is useful if you want to subscribe this mailing list to other mailing lists. Note: when an auto-generated message should be posted on the list, and the message is not a message generated by the list owner, the message Sender address (if exists) is used instead of the From address. If that address is subscribed to the list, and the subscriber posting mode is set to Special, the message is posted. You can open the subscribers list and change this setting for individual subscribers. You may want to change this setting to Unmoderated for some users, letting only those users post messages on the list, while posting from all other users (and new users) will be either stored for approval or rejected.
This setting specifies the allowed MIME format for postings.
plain text only: only messages in the text/plain format can be posted.
text only: only messages in the text (text/plain, text/html, etc.) formats can be posted.
text alternative: only messages in the text format or multipart/alternative messages that contain a part in the text format can be posted (for example, a