// [html] = ... html content of message
// [file] => Array
// (
// [0] => Array
// (
// [name] => file.png
// [type] => image/png
// [content] => ... (binary content of attachments)
// )
// )
// set message as seen
$imap->setMessageSeen('inbox', 175, true);
// set message as unseen
$imap->setMessageSeen('inbox', 175, false);
// set message as flagged
$imap->setMessageFlagged('inbox', 175, true);
// set message as unflagged
$imap->setMessageFlagged('inbox', 175, false);
// set message as answered
$imap->setMessageAnswered('inbox', 175, true);
// set message as unanswered
$imap->setMessageAnswered('inbox', 175, false);
// mark group of messages as seen
$imap->setMessageSeen('inbox', 171, true, true);
$imap->setMessageSeen('inbox', 172, true, true);
$imap->setMessageSeen('inbox', 173, true, true);
// and saves it
$imap->expunge();
// delete message
$imap->deleteMessage('inbox', 174);
// mark group of messages as deleted
