Complex day at Twilio

Choose an email cutover while suppression data stays uncertain

Published Oct 28, 2026

You’re the product manager. Your team is in the room.

The setting

supplies cloud software that lets developers and businesses build messaging, voice, and email into their applications. Its gathers these tools, along with identity checks and customer data.

The email API retirement date conflicts with the need to prove suppression behavior under live traffic.

Infrastructure retirement protects the future platform, while verified suppression behavior protects customer deliverability and trust.

Who you’d be doing this for

“My compliance lead asked whether blocked addresses can get mail after cutover, and I don’t have a clean answer.”

Trond Heikkinen · Email Platform Engineer · a character in this brief

Owns transactional email delivery for an enterprise customer moving from the older email API.

What is at stake

Enterprise email accounts risk sending to addresses that should remain suppressed. You must choose whether to hold the retirement or cut over with a narrower verified path.

Why it isn’t already fixed

Every obvious fix costs something else. That’s the part you’d have to decide.

  • retirement commitment vs suppression integrity
  • enterprise continuity vs platform simplification
  • live-traffic proof vs irreversible exposure
  • deliverability protection vs migration speed

Why Twilio

Email API migrations affect the deliverability and revenue of customers who rely on communication APIs for transactional messages.

Written with these in mind

platform product managerdeveloper experience product manageremail infrastructure product manager

Not your kind of problem? 41 more at Twilio, or browse every organization.

Where the organization context comes fromThe postings this brief was written from, and the reporting read before it.

The organization context comes from public information. The situation and characters are written for the brief.

Job postings it was written from

Public descriptions of the work at Twilio. They are listed as sources, not as openings. The lines under a posting are its own words, where it meets this brief.

This is the setup. The work is inside.

Running it puts you in the room: the full situation and its constraints, stakeholders who push back in their own words, and the decisions that are yours to make. What you produce becomes a Day One Plan — work you can show someone instead of describing.

Other live briefs connected to this one, and what connects them.

Similar problems at other organizations

Like this one, each of these is about an irreversible change forced by a fixed date.

The same setting, from another role

Each is set around Twilio’s Twilio Customer Engagement Platform, written for a different role. They’re separate briefs, not the same scenario.

Other problems with a similar purpose

In each of these, as in this one, the aim is to walk a customer through a high-stakes, hard-to-reverse change with the evidence and care that keeps their trust intact.