Posting this on behalf of a user.

Domain from email variable would allow me to make templates that I can use over different brands. Rather than having to make hundreds of templates.

The following would all me to make one template for 14 brands so if I have to make 10 brand specific template with the current set up I would have to make 140 - with this variable only one - {{ domain.from.email }}

but this could be also useful in templates referring to the clients site.

{{ domain.to.email }}