@item :mailbox
The name of the mailbox to get mail from. The default is @samp{INBOX}
-which normally is the mailbox which receives incoming mail.
+which normally is the mailbox which receives incoming mail. Instead of
+a single mailbox, this can be a list of mailboxes to fetch mail from.
@item :predicate
The predicate used to find articles to fetch. The default, @samp{UNSEEN