I posted earlier today asking for a method of CDONTS that allows to receive a notification that the receipient read the mail you sent. <BR>I looked around and found here http://msdn.microsoft.com/library/default.asp?URL=/library/psdk/cdosys/_cdosys_schema_mailheader_disposition-notification-to.htm a constant that apparentely does what I need. <BR>I still have a problem though. it is a constant (CdoMailHeader.cdoDispositionNotificationTo) but I don&#039;t know to what it refers.. I mean to which object. <BR><BR>dim objMail<BR>Set objMail = Server.CreateObject("CDONTS.Newmail")<BR>objMail.? ???? = CdoMailHeader.cdoDispositionNotificationTo<BR><BR> Can anybody help me, please?