You've to specify at least that you're using SMTP and SMTP server address. There're some other configuration items you can specify.

oConf = createobject("cdo.configuration")
oFlds = oConf.Fields
With oFlds
    .Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2  && cdoSendUsingPort
    .Item("http://schemas.microsoft.com/cdo/configuration/smtpserver") = ;
    			"<SMTP server address>"
    .Update()
EndWith
...
With loMsg
   .Configuration = oConf
...

>>
>>
>I'm a begginer for CDO.. What do you meant by setup configuration info ? May I have to setup some stuff before ?
>