Transactional vs Marketing Email: Why the Difference Matters
Mixing OTPs and newsletters under one reputation bucket is usually a mistake. Separation is one of the simplest ways to protect critical email.
Not all traffic behaves the same way
Transactional email is expected, time-sensitive, and tied to account or payment events. Marketing traffic usually carries different engagement and complaint patterns.
If both share the same reputation surface without good controls, the more volatile traffic can drag down the mail that matters most.
What separation looks like
At a minimum, keep distinct message streams, analytics, and webhook monitoring. More mature setups also separate provider routing, tracking domains, and return-path behavior.
Next step
Turn the same standards into your own sending flow
Move from sandbox to a verified domain, live keys, and event-driven delivery insights without giving up control of your production workflow.