(PHP 4 >= 4.0.5, PECL vpopmail >= 0.2) Add a new virtual domain

(PHP 4, PHP 5, PHP 7) Delete all messages marked for deletion

(PHP 4, PHP 5, PHP 7) Returns all IMAP alert messages that have occurred

(PHP 4, PHP 5, PHP 7) Returns status information on a mailbox

(PHP 4 >= 4.0.7, PECL vpopmail >= 0.2) Insert a virtual alias

(PHP 4, PHP 5, PHP 7) Gets and sort messages

(PHP 4, PHP 5, PHP 7) Gets the message sequence number for the given UID

(PHP 4 >= 4.0.5, PECL vpopmail >= 0.2) Delete a user from a virtual domain

(PHP 4, PHP 5, PHP 7) List all the subscribed mailboxes

(PHP 4, PHP 5, PHP 7) Copy specified messages to a mailbox