Having trouble with adding data rows

Hello,

I’m having issues populating my data rows. The error I’m getting I think pertains to the message type created in the build data table activity. I’ve tried genericvalue, system.net.mail.mailmessage, string, and system.data.datatable , but nothing has worked and I keep getting errors corresponding to the type message type. I’ve attached the error message below.
image



Thanks in advance

Check MailDate data type…