SansMail Temporary Email Instan: Instant disposable email with realtime inbox & custom domain

Hey Product Hunt! 👋 I built SansMail because I was tired of getting spam after signing up for random services. Giving out my real email every time felt like a privacy risk. Most temp mail services I tried had the same problem: you had to keep refreshing to check if an email arrived. So I built SansMail with a realtime WebSocket inbox. Emails appear the moment they land, no refresh needed. The custom domain feature came later when developer friends asked if they could use their own domain for testing. Turns out it was pretty simple to add and makes it way more useful for app testing workflows. Would love to hear your feedback, especially from developers who do a lot of integration testing. What features would make this more useful for you? Happy to answer any questions! 🙏