Editing IMAP ACLs
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ACL stands for Access Control List. ACLs are used in IMAP for
limiting (or enabling) other users access to your mail boxes. Not all
IMAP servers support this, this function will give an error if it
doesn't.
To edit a ACL for a mailbox, type `G l'
(`gnus-group-edit-nnimap-acl') and you'll be presented with a ACL
editing window with detailed instructions.
Some possible uses:
* Giving "anyone" the "lrs" rights (lookup, read, keep seen/unseen
flags) on your mailing list mailboxes enables other users on the
same server to follow the list without subscribing to it.
* At least with the Cyrus server, you are required to give the user
"anyone" posting ("p") capabilities to have "plussing" work (that
is, mail sent to user+mailbox@domain ending up in the IMAP mailbox
INBOX.mailbox).