Postmaster vs trigger

Anyone fiddled with a lot of postmaster filters and triggers?

Curious which one causes less stress on the system, doing tasks such as:

  • Recognizing email ending with ‘xxx’
  • Placing emails in certain groups
  • Adding some custom fields

So far i can’t decide, both seem fast even with minimal resources to spare. What is your experience? Any mishaps/specific traits to avoid?

Bonus question, “Emails - ending with” do you use @domain. com or just domain. com ?