Question: Our company has multiple products/services to support, I would like to use separate "from" addresses for those tickets, and possibly, different email-templates, how do I do that?
Answer: You can set up different "from" addresses for different ticket-categories. Just go to "Admin - Ticket categories", create a category (or click an existing one) and check out "Use a different "from" address for email-notifications in this category" and "Use a different email-notification template in this category" settings.