Transactional Email

Transactional vs marketing email: the difference explained for 2026. Definitions, examples, deliverability rules, and when to use each type.

Learn the difference between transactional and marketing email, why it matters for deliverability and consent, and how to separate both streams cleanly.

Every 'best email service' list is sponsored. Here's an unsponsored framework for actually choosing — based on what you're sending and what you'll regret skipping.

Your open rates dropped and you blamed your subject lines. The real culprit is usually deliverability — the metric that fails invisibly and takes everything down with it.

Password resets, receipts, alerts — the unglamorous emails your product can't function without. Here's why you need a proper API for them, not a hacked-together script.

Mixing your password resets with your promotions on the same sending infrastructure is a quiet way to break both. The two email types have opposite requirements — and they need separation.

Three cryptic acronyms stand between your emails and the inbox. Here's what each one actually does, in plain English, and why you can't skip any of them.

They're both 'just email,' so why does everyone insist on separating them? Because one bad marketing blast can stop your users from resetting their passwords.

Transactional email, sending domains, authentication, deliverability — the whole stack explained without the jargon, so your emails actually reach the inbox.