I'm using express accounts 3 years ago and really happy with it, especially its flexibility. One thing I would like to implement but couldn't get it done.
I'm used to send emails to our customers by saving the sales orders, invoices and attach them manually. I decided to use the built-in email feature. However, I think it is not flexible enough as I see, unless, I'm missing some parts.
I need to customize the subject and the body of emails for example including customer name in the subject. I was thinking about using variables like $Customer in the header of the email but it didn't work.