CDO message with CC or BCC fails to send

[DebbieDavis]

Greetings, I'm using this simple code to send customers an email after their helpdesk ticket is resolved. I wanted to copy myself on the emails, but
when I enter

myMail.BCC or myMail.CC

, it fails to send. If I comment out these lines, the message sends successfully. I've made sure the bcc or cc addresses are valid. (I changed the names in my post to protect the innocent).

Any thoughts? Thanks.

Set myMail=CreateObject("CDO.Message")
myMail.Subject="Helpdesk Ticket Resolution"
myMail.From="helpdesk@helpdesk.com"
myMail.To="user@oursite.com"
myMail.BCC="webmaster@helpdesk.com"
myMail.HTMLBody=body
myMail.Configuration.Fields.Item _
("[URL unfurl="true"]http://schemas.microsoft.com/cdo/configuration/sendusing")=2[/URL]
'Name or IP of remote SMTP server
myMail.Configuration.Fields.Item _
("[URL unfurl="true"]http://schemas.microsoft.com/cdo/configuration/smtpserver")[/URL] _
="mail.server.com"
'Server port
myMail.Configuration.Fields.Item _
("[URL unfurl="true"]http://schemas.microsoft.com/cdo/configuration/smtpserverport")[/URL] _
=25 
myMail.Configuration.Fields.Update
myMail.Send