Here are multiple problems in the code provided by you.
1. You are using ObjSendMail while doing configuration but sending email using objMail. So replace ObjSendMail with objMail.
2. Fields.Update is called before setting all the properties.
3. There is a statement SET Mail = nothing. But the name of object is objMail and not Mail.
4. There is an end if statement at the end, but I could not find corresponding if statement.
Here is a complete code that I tested using a gmail account and it works fine:
<%@LANGUAGE="VBSCRIPT"%>
<%
Dim objMail
Set objMail = Server.CreateObject("CDO.Message")
smtpServer = "smtp.live.com"
yourEmail = "youremail@hotmail.com"
yourPassword = "yourpassword"
sendEmailTo = "send_email_to@hotmail.com"
objMail.From = yourEmail
objMail.To = sendEmailTo
objMail.Subject="Application Form Registration Details"
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserver") = smtpServer
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate") = 1
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 465
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpusessl") = true
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendusername") = yourEmail
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendpassword") = yourPassword
objMail.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpconnectiontimeout") = 60
objMail.Configuration.Fields.Update
objMail.htmlBody = "This is test message"
objMail.Send
Set objMail = Nothing
response.write("mail send successfully!")
%>
You can try this code by replacing youremail@hotmail.com and yourpassword with actual email id and the password. If you are not using hotmail account then change the smpt.live.com also. For example, for a gmail account you have to use smtp.gmail.com