The CDOSYS mailing component is supported and recommended. Below is an example of how to use the mailing component in ASP:

Dim Subject, Body, SenderEmail, RecipientEmail, SMTPServer, SMTPusername, SMTPpassword

SenderEmail = "me@mydomain.tld"
RecipientEmail= "someone@somedomain.tld"
SMTPserver = "mail.mydomain.tld"
SMTPusername = "me@mydomain.tld"
SMTPpassword = "mypassword"

Subject = "Hello"
Body = "This is a test. Please ignore."

sch = "http://schemas.microsoft.com/cdo/configuration/"
Set cdoConfig = CreateObject("CDO.Configuration")
With cdoConfig.Fields
.Item(sch & "sendusing") = 2
.Item(sch & "smtpserver") = SMTPserver
.Item(sch & "smtpserverport") = 25
.Item(sch & "smtpauthenticate") = 1
.Item(sch & "sendusername") = SMTPusername
.Item(sch & "sendpassword") = SMTPpassword
.Item(sch & "smtpusessl") = False
.Item(sch & "connectiontimeout") = 100
.update
End With
Const cdoSendUsingPickup = "c:\inetpub\mailroot\pickup"
Set cdoMessage = CreateObject("CDO.Message")
With cdoMessage
Set .Configuration = cdoConfig
cdoMessage.From = SenderEmail
cdoMessage.To = RecipientEmail
cdoMessage.Subject = Subject
cdoMessage.TextBody = Body
cdoMessage.Send
End With
Set cdoMessage = Nothing
Set cdoConfig = Nothing