mermaid.initialize({ startOnLoad: true });</script><metacontent="Aron Petau"property=og:site_name><metacontent="Postmaster - Aron Petau"property=og:title><metacontent=https://aron.petau.net/project/postmaster/property=og:url><metacontent="I now manage the domain petau.net with a mail server and attached sites."property=og:description><metacontent=https://aron.petau.net/card.pngproperty=og:image><metacontent=en_USproperty=og:locale><body><headerid=site-nav><nav><ahref=#main-contenttabindex=0> Skip to Main Content </a><ul><liid=home><ahref=https://aron.petau.net><iclass=icon></i>Aron Petau</a><liclass=divider><li><ahref=https://aron.petau.net/project/>Projects</a><li><ahref=https://aron.petau.net/pages/contact/>Contact</a><li><ahref=https://aron.petau.net/pages/cv/>CV</a><li><ahref=https://aron.petau.net/pages/about/>About</a><liid=search><buttonclass=circleid=search-toggletitle=Search><iclass=icon></i></button><liid=language-switcher><detailsclass=closable><summaryclass=circletitle=Language><iclass=icon></i></summary><ul><li><ahref=https://aron.petau.net//de/project/postmaster/lang=de>Deutsch</a></ul></details><liid=theme-switcher><detailsclass=closable><summaryclass=circletitle=Theme><iclass=icon></i></summary><ul><li><buttontitle="Switch to Light Theme"class=circleid=theme-light><iclass=icon></i></button><li><buttontitle="Switch to Dark Theme"class=circleid=theme-dark><iclass=icon></i></button><li><buttontitle="Use System Theme"class=circleid=theme-system><iclass=icon></i></button></ul></details><liid=feed><detailsclass=closable><summaryclass=circletitle=Feed><iclass=icon></i></summary><ul><li><ahref=https://aron.petau.net/rss.xml>RSS</a><li><ahref=https://aron.petau.net/atom.xml>Atom</a></ul></details><liid=repo><aclass=circlehref=https://forgejo.petau.net/aron/awebsitetitle=Repository><iclass=icon></i></a></ul></nav><divid=search-container><labelclass=visually-hiddenfor=search-bar>Search</label><inputplaceholder="Search for…"autocomplete=offdisabledid=search-bartype=search><divid=search-results-container><divid=search-results></div></div></div></header><mainid=main-content><article><divid=heading><p><small><timedatetime=" 2023-12-06T00:00:00+00:00">Published on December 06, 2023</time></small><h1>Postmaster</h1><p><small><span>By Aron Petau</span><span> • </span><span>3 minutes read</span><span> • </span></small><ulclass=tags><li><aclass=taghref=https://aron.petau.net/tags/activitypub/>activitypub</a><li><aclass=taghref=https://aron.petau.net/tags/dev-ops/>dev-ops</a><li><aclass=taghref=https://aron.petau.net/tags/email/>email</a><li><aclass=taghref=https://aron.petau.net/tags/federation/>federation</a><li><aclass=taghref=https://aron.petau.net/tags/open-protocols/>open protocols</a><li><aclass=taghref=https://aron.petau.net/tags/peer-to-peer/>peer-to-peer</a><li><aclass=taghref=https://aron.petau.net/tags/petau-net/>petau.net</a><li><aclass=taghref=https://aron.petau.net/tags/server/>server</a><li><aclass=taghref=https://aron.petau.net/tags/web/>web</a></ul></div><divid=buttons-container><atitle="Go to Top"href=#topid=go-to-top><iclass=icon></i></a><ahref="https://shareopenly.org/share/?url=https://aron.petau.net/project/postmaster/&text=I%20now%20manage%20the%20domain%20petau.net%20with%20a%20mail%20server%20and%20attached%20sites."id=sharetitle=Share><iclass=icon></i></a><atitle="File an Issue"href=https://forgejo.petau.net/aron/awebsite/issuesid=issue><iclass=icon></i></a></div><h2id=Postmaster>Postmaster</h2><p>Hello from <ahref=mailto:aron@petau.net>aron@petau.net</a>!<h2id=Background>Background</h2><p>Emails are a wondrous thing and I spend the last weeks digging a bit deeper in how they actually work. Some people consider them the last domain of the decentralized dream the internet once had and that is now popping up again with federation and peer-to-peer networks as quite popular buzzwords.<p>We often forget that email is already a federated system and that it is likely the most impo