CheckName Method
Validates the e-mail addresses that appear in the To:, Cc:, and Bcc: lines in the active e-mail message. This method is available only if you are using Word as your e-mail editor.
Note If the names cannot be validated, the Check Names dialog box is displayed.
expression.CheckName
expression Required. An expression that returns a MailMessage object.
Example
This example validates the e-mail addresses that appear in the active e-mail message.
Application.MailMessage.CheckName