mailX by mailwarm

mailWarm built mailX because somewhere between sending your pitch and it landing in spam, everyone just accepted that email deliverability was a mystery you couldn't solve. It's not. mailX is an email deliverability toolkit that works for both humans and AI agents—yes, AI agents, because apparently even robots need to land in the inbox now. They came out of Y Combinator's Winter 2020 batch and they're fixing one of the most boring but lucrative problems in tech: making sure your emails actually get read. There are 4 billion email users worldwide and deliverability is the gatekeeper that decides whether you're a newsletter or a ghost. mailX scans your sending infrastructure, checks your domain reputation, and tells you exactly what to fix before Gmail or Outlook buries you in spam. Whether you're a startup sending outreach or an AI agent automating communications at scale, getting delivered is everything. They just launched on Product Hunt and they're going after a market that everyone who sends email at volume cares about but almost no one knows how to optimize.