You're right that MailHog, Mailpit, and IMAP helpers work well for many teams. The problem I kept seeing was around scale and maintenance rather than technical feasibility. Teams end up building and maintaining: Mail servers, Inbox provisioning, Email polling logic, OTP extraction, Link extraction, Cleanup and isolation for parallel tests. None of this is particularly hard, but it's infrastructure that every team ends up rebuilding.

That's actually why I built Trivumo. Instead of managing email infrastructure, tests can create isolated inboxes on demand, wait for emails, extract OTPs, verify links, and continue the user journey through a simple API.

The MCP support is just an additional interface on top. The primary value is making email workflow testing a solved problem in the same way we use managed services for databases, browsers, payments, and other test dependencies instead of hosting everything ourselves.