wa_receipt.php - understanding the process and how to style?

At what stage in the process does an e-mail receipt get sent out to a customer upon successful payment?
I can't see the behaviour on checkout_success.php.

We'd also like to style the receipt to match our site - is that done via a Universal E-mail behaviour? I can see a file called wa_receipt.php in webassist > email > templates but I'm weary of just editing that page directly.

Appreciate the advice. Thank you.
NJ

the UE behavior is on the confirm page and the pp_confirm page.

both pages use the wa_receipt.php page as the template for the email body.

edit the design on that page to change the look of the email.

If you are weary of making changes to that file, back it up fIrst.

be aware, that email clients do not read linked style sheets, so any css for the email is not done using classes like you would do on a web page, but through inline style, for example:

<div style="color:#000">content</div>

also, any images or links in the email body must use a fully qualified URL.