function LoginSASL(
    const ACmd: String; 
    const AServiceName: String; 
    const AOkReplies: array of string; 
    const AContinueReplies: array of string; 
    AClient: TIdTCPConnection; 
    ACapaReply: TIdStrings; 
    const AAuthString: String = 'AUTH'
): Boolean; overload;