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🚀 MailChannels Email API launched on Product Hunt today! When one customer on your platform sends something bad, receivers suspend your whole account, not them. We spent years solving this for hosting providers: every sender gets its own identity, limits, and suspension path, so bad actors get contained, not absorbed. Let your users, customers, and agents send. Keep your reputation. If you’ve ever used us, or just want more people to know this product exists, we’d love your support on Product Hunt today. 👇 Link in comments.

A single bad tenant can blacklist your entire platform. MailChannels contains the damage in real time—isolating threats while your good senders keep reaching inboxes. Stop letting one actor ruin deliverability for everyone.

Don't rip and replace. Add MailChannels for the email traffic that matters most—tenant-authored or high-risk sends. Pilot on one stream, expand after results. The complementary lane model that grows with your business while protecting what counts.

One compromised tenant shouldn't put your entire platform at risk. MailChannels isolates tenant traffic to protect domain reputation across your SaaS platform. Enable richer email features without platform-wide exposure.

Most email APIs just send messages. MailChannels blocks threats first. Real-time filtering catches compromised accounts and phishing before they damage your domain reputation. Protect legitimate senders while isolating bad actors—automatically.

We have spent more than $2M building MailChannels Email API. It works. Almost nobody uses it. For the next four weeks, that is the only problem I am working on. First, we're not spring chickens. MailChannels has been sending email for web hosting providers since 2012. Web hosting is the most adversarial sending environment that exists: anyone with bad intentions can compromise a WordPress site on a shared host and push phishing through your infrastructure. We have spent over a decade building systems that survive that at scale. Today we send for over 4 million active sending domains and tens of millions of end users across 2,000+ direct customers, including 36% of the top 50 hosting and WordPress hosting providers globally (Hostinger, the world's #1, is one). We process billions of messages per month, peak at 10,000 messages per second, and block over 4 million unique phishing sources every month. Our reputation database ingests 500,000 delivery metrics per second and returns lookups in under a millisecond. On top we built a modern Email API: sync and async sending (fire 1,000 messages down the pipe in milliseconds and move on), click/open/delivery webhooks, multi-tenant sub-accounts, hosted DKIM, the works. Yet, almost no developer outside of web hosting uses it. The product is not the problem. Everything around the product is: Our onboarding was built for hosting providers a decade ago. A developer signing up lands in a host console optimized for WordPress customer success teams, not a developer surface. Our documentation is technically complete but visibly thin. Few examples, no walked-through use cases. We have zero officially supported SDKs in any language. Resend has ten. The community-maintained Python and TypeScript clients we do have, we have not officially adopted. If a developer finds MailChannels, there is no reason to stay. So we are going to fix that. By June 5th, a protected team of five of our best people will ship the entire developer surface with no distractions. The standard is this: a developer can land, find pricing, install an SDK, send, configure webhooks, handle bounces and complaints, and see why we are different for multi-tenant and agentic sending. No apology tour. No "the docs are rough." No hidden GitHub repos. Specifically: • Public pricing • Node/TypeScript, Python, PHP, and Go SDKs • Quickstarts in each language • Best-in-class documentation • Multi-tenant architecture guide • SMTP, troubleshooting, and migration pages for SendGrid, SES, Mailgun, Postmark • Agent-facing SKILLS.md • Launch-rehearsal pass on every developer journey I will post the scorecard publicly every Friday. Greens, yellows, reds. If we slip, you will see it. Committing in public is a forcing function. If we ship what we said we would, you should see MailChannels on your radar for the first time. If not, you should see me write a candid post about what we got wrong.