Promotional Bulk Email Software Setup

I need a seasoned mailing-software expert to get my promotional newsletters out reliably and at scale. The goal is a turnkey application— I need a software such as SendBlaster etc.

Working with a software that support the SMTP Choice below:

Supports SMTP with TLS/STARTTLS
Lets you set host to smtp-broadcasts.postmarkapp.com
Supports port 587 (or 2525)
Allows SMTP auth where Username = Password = your Server API Token
Optional: supports custom headers (for X-PM-Message-Stream) or supports using an SMTP Token

Key things I expect from the finished system include straightforward template editing, solid deliverability practices, list management with unsubscribe compliance, and clear performance stats so I can see opens and clicks. If your preferred stack already bundles automated scheduling or A/B testing, that’s a plus; if it doesn’t, guide me on viable add-ons.

The deliverable is a fully working setup with a short walkthrough so I can maintain and run future campaigns myself. I’m open to your recommendations on software choice, server configuration, and any best-practice tweaks that will maximise reach for promotional content.