Notification e-mails for watched products are sent out by the customer/email/watch job after the product was updated. This includes both, price and stock level updates.
Shop owners have the possibility to configure specific e-mail settings for the product notification e-mails that differ from the common settings. Each specific setting overwrites the correlated common setting for the watch e-mails. The list of specific settings are:
Product notification e-mails consists of a HTML and a text part. They are sent in one e-mail as alternative views and the mail clients will display the one that is preferred by the customer. Like the other components, they are composed of several subparts which can be rearranged, replaced, removed or new ones added. The HTML subparts are configured via the client/html/email/watch/html/standard/subparts setting while the text subparts can be changed with the client/html/email/watch/text/standard/subparts option.
You can adapt the templates for the HTML/text product notification e-mails itself and the included sections by overwriting them in your own extension or configuring alternative template names:
If you want to change the HTML structure of one of the templates, please have a look at the original versions to ensure that you don't loose essential functionality.