Synchroteam allows you customize the subject and body email sent out manually with your job report PDFs.
Go to (1) Settings, click on More (2) then click on the Email for Job Reports (3).
To add a field to your email template, simply click on the arrow to the left of the field.
The field then moves to the selected section.
In the job report preview, when you hit the "Send as PDF" button, the email sent out along with the Job report PDF and follows the structure in your email template.