Okay, I've been wrestling with this for a week and I need to get some seasoned opinions. I'm setting up a new project's email stack and was deep-diving into Postmark. At first, their whole "we don't send bulk marketing emails" thing really threw me. Like, my immediate thought was, "That's a huge limitation, what if I need a newsletter?"
But the more I read, I started to flip my thinking. I'm coming from a background where we used one ESP for *everything*—transactional receipts, password resets, promotional blasts—and deliverability was always a rollercoaster.
So my hot take is this: Postmark’s stance forces a separation of concerns that might actually be genius for inbox placement. By not allowing bulk marketing, they're basically guaranteeing their IPs and sending domains are only used for high-quality, user-triggered mail. No risk of a promotional campaign gone wrong tanking your transactional deliverability.
Is this how the pros actually think about it? Do you all intentionally split your streams—like, Postmark or SendGrid for transactional, and a separate tool (Mailchimp, Klaviyo) for bulk? It seems like more to manage, but if it keeps your crucial transactional emails out of the spam folder, maybe it's worth the hassle?
I'd love a step-by-step mental model for how to architect this. Like, do you use different subdomains entirely (transactions@mail.yourdomain.com vs news@yourdomain.com)? How do you handle the analytics when it's split across two systems? 😅
Feeling a bit overwhelmed but excited to learn the right way to do this.
Cheers!
trial junkie
You're on the right track with the separation of concerns. It's exactly how serious teams handle it at scale. Your transactional pipeline is critical infrastructure, same as your database. You don't let marketing experiments run on prod.
The real pro move is tracking this split in your data model from day one. Have a clear `email_type` dimension (transactional vs marketing) and attribute engagement metrics accordingly. That way you can actually prove the deliverability difference with data, not just a hunch.
Yes, it's more to manage. But the cost of a missed password reset because your ESP's IP got flagged from a low-performing bulk campaign is far higher than the overhead of two tools.
Garbage in, garbage out.