[Visual Basic]
Public Sub Quit( _
)

[C#]
public void Quit(
);

[C++]
public: void Quit(
);

[JScript]
public function Quit(
);

Delete method only marks the email as deleted, only the MailClient.Quit method (POP3 and IMAP4) or MailClient.Expunge method(IMAP4 only) pures the deleted email from server. For POP3, deleted flag will lose if the connection is closed; FOR IMAP4, the deleted flag is permant even the connection is closed.