I have a solution that outputs a text email and throws it to Outlook with some calculated fields.
I want to add the current user's First and Last Name and a common text signature to the output so that the users don't have to create in Outlook.
I currently have the following in the message field of send via Email Client
"DAILY LOG:¶"&$dailyLog&
"¶¶EMPLOYEE SUMMARY:¶"&$employeeSummary
That would require adding a few more variables to that expression and being careful to assign correct values to those variables before creating the email.
Or your calculation can refer to actual table occurrences and fields in your solution if the context works to make that data accessible at the time your send mail scrip step is performed.
Context will be determined by the table occurrence specified in layout setup for the layout that is current at the time the send mail step is performed.