Deliverability, email infrastructure, and notes from building Anypost.
RSSFour teams touch your password reset and none of them own it. Why transactional email is the most neglected mail in a SaaS company, what that costs you, and what the teams that get it right do differently.
The overage rate is the real price of transactional email, and it is the number vendors decline to print. What the market charges, and how to model it at 10x.
DKIM signs the message but not the recipient. That gap is how replay attacks work, and DKIM2 closes it. What is changing, and what to do today.
We built a fast MTA and named it after a term most buyers had never heard of. What we got right, what we got wrong about pricing, and why we are now Anypost.