SMTP configuration SendUsing configuration value is invalid with ASP-Classic

Question

I\'m trying to get an email sent using ASP classic, and am having trouble with SMTP configuration.

The error:

CDO.Message.1 error \'80040220\'

Answer 1

As the SMTP service is on the localhost it makes more sense to send to pickup directory using SendUsingPickup (1). This will be more efficient than sending over network to port 25.

objMsg.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 1
objMsg.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserverpickupdirectory") = "C:\Inetpub\mailroot\Pickup"
objMsg.Configuration.Fields.Update 

Answer 2

If you are specifying an smptserver, be sure to set your 'sendusing' field to 2 (or cdoSendUsingPort) as well:

objMsg.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
objMsg.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "localhost"
objMsg.Configuration.Fields.Item("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
objMsg.Configuration.Fields.Update