https://petemahon.net/tags/easy-switch/Recent content in Easy-Switch on PeteMahon.netHugoen-us<a href="https://creativecommons.org/licenses/by-nc/4.0/" target="_blank" rel="noopener">CC BY-NC 4.0</a>Sun, 26 Apr 2026 17:00:00 +0400https://petemahon.net/posts/migrating-inbox-from-m365-to-proton/Sun, 26 Apr 2026 17:00:00 +0400https://petemahon.net/posts/migrating-inbox-from-m365-to-proton/<p><em>This is where data actually moves. <a href="https://petemahon.net/posts/proton-mail-custom-domain/">Post 3</a> got Proton set up on your custom domain and your DNS records trusted; this post is the cutover itself - pulling mail across from M365. If you&rsquo;ve arrived here from a search engine, note that the earlier posts aren&rsquo;t prerequisites if you already have Proton on a custom domain with MX records created but not yet live.</em></p> <h2 id="before-you-start">Before you start</h2> <p>So far, your incoming email should have started appearing in your Proton mailbox, and you should have been able to send emails from Proton as well. Let&rsquo;s just double-check you have everything in place.</p>