HI, I have a similar problem.
I've set up loop to iterate over a table containing just one column of reference numbers. The e-mail is to be sent back to me where another application looks at the subject line to automatically attach the e-mail to client records. To do this the subject line must contain individualised reference numbers from my table. I haven't found anything in the Send Mail Task Editor that allows anythin other than a static entry in the Subject field. Is what I'm trying to do just not possible?