Every client’s email, in one place.
Mailroomly gives software companies and integrators one organization per client, each with its own domains, sending reputation, limits and data. One sign-in switches between them. Your clients’ apps send through a drop-in API, their teams answer in shared inboxes, and each client needs one plan instead of a sending service, a shared inbox and a newsletter tool.
Last updated October 20, 2026
What you get for every client
One organization per client
Its own domains, sending reputation, limits, retention and data. One client’s bounces never touch another’s sending.
One sign-in for all of them
Belong to every client’s organization you run, and switch between them from the account menu.
A drop-in API
Their apps keep their SendGrid, Mailgun or Postmark code: change the host and the key.
Clients answer their own customers
Give a client’s team its addresses, while you run the setup, the apps and the agents.
Agents per client
Each agent’s token belongs to one organization, with the addresses and actions you choose.
Fewer bills to resell or absorb
One plan per client covers sending, the inbox, campaigns and connected agents.
Each client’s data, theirs to take
Export an organization’s email, contacts and settings, or close it, whenever the client asks.
Moving takes an afternoon
Keep your SDK, your requests and your webhook handlers. Change the host and the key.
SendGridapi.sendgrid.comapp.mailroomly.com
Mailgunapi.mailgun.netapp.mailroomly.com
Postmarkapi.postmarkapp.comapp.mailroomly.com
…and the key: a Mailroomly key in place of the old one.
Partner terms
There’s no partner console or white-label. Tell us how you bill your clients, and we’ll agree terms that fit.
Ask about partner termshello@mailroomly.com
We help you move your first app
On a paid plan, someone from our team moves your first app and its webhooks with you, so the next ones are routine.
Book it with ushello@mailroomly.com
Moving from SendGrid, Mailgun or Postmark? Ask us for a switcher code.
Questions from integrators
Can my clients see each other?
No. Each client is its own organization, and each user sees only the organizations they belong to.
Who pays for a client’s organization?
Each organization has its own plan. You can pay for your clients’ plans or let them pay, and partner terms are agreed with us.
Can a client send from its own domain?
Yes. Each organization verifies its own domains, and its email is signed as the client’s own.
Bring all your email into one place.
Start free with a free address today. Move your apps, your team and your agents when you’re ready.