Appends a string message to the specified mailbox.
imap_streamAn IMAP stream returned by imap_open().
mailboxThe mailbox name, see imap_open() for more information
messageThe message to be append, as a string
When talking to the Cyrus IMAP server, you must use "\r\n" as your end-of-line terminator instead of "\n" or the operation will fail
options
If provided, the options will also be written
to the mailbox