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

(PHP 4, PHP 5, PHP 7) Returns all of the IMAP errors that have occurred

(PHP 4, PHP 5, PHP 7) Sets flags on messages

(PHP 4, PHP 5, PHP 7) Close an IMAP stream bool

(PHP 4, PHP 5, PHP 7) Returns header for a message

(PECL mailparse >= 0.9.0) Incrementally parse data into buffer

(PHP 4, PHP 5, PHP 7) Decode BASE64 encoded text

(PHP 4 >= 4.0.5, PECL vpopmail >= 0.2) Add an alias for a virtual domain

(PECL mailparse >= 0.9.0) Parses a file resource

(PHP 4, PHP 5, PHP 7) Subscribe to a mailbox