https://petemahon.net/tags/custom-domain/Recent content in Custom-Domain on PeteMahon.netHugoen-us<a href="https://creativecommons.org/licenses/by-nc/4.0/" target="_blank" rel="noopener">CC BY-NC 4.0</a>Tue, 21 Apr 2026 17:00:00 +0400https://petemahon.net/posts/proton-mail-custom-domain/Tue, 21 Apr 2026 17:00:00 +0400https://petemahon.net/posts/proton-mail-custom-domain/<p>This is part 3 of a series on moving a personal domain from Microsoft 365 to Proton. <a href="https://petemahon.net/posts/why-i-left-microsoft-365-for-proton/">Post 1</a> covered the why, and <a href="https://petemahon.net/posts/migrating-dns-to-cloudflare/">post 2</a> moved DNS to Cloudflare. This post is the heart of the migration — getting Proton Mail working on a custom domain, understanding how Proton&rsquo;s address model differs from what you&rsquo;re used to, and getting your DNS records right so mail delivery is trusted.</p> <p>If you&rsquo;ve landed here straight from a search engine, the earlier posts aren&rsquo;t prerequisites — you can follow this one standalone, provided you already control your DNS somewhere that lets you add TXT and MX records.</p>