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50 KiB
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104 lines
No EOL
50 KiB
HTML
<!DOCTYPE html><html lang="en" dir="ltr" data-theme="dark" data-has-toc data-has-sidebar class="astro-bguv2lll"> <head><meta charset="utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1"/><title>Virtual domains | ISPmail Guide</title><link rel="canonical" href="https://workaround.org/ispmail-trixie/virtual-domains/"/><link rel="sitemap" href="/sitemap-index.xml"/><script src="https://rybbit.workaround.org/api/script.js" data-site-id="1" async defer></script><link rel="shortcut icon" href="/favicon.svg" type="image/svg+xml"/><meta name="generator" content="Astro v5.16.6"/><meta name="generator" content="Starlight v0.35.3"/><meta property="og:title" content="Virtual domains"/><meta property="og:type" content="article"/><meta property="og:url" content="https://workaround.org/ispmail-trixie/virtual-domains/"/><meta property="og:locale" content="en"/><meta property="og:description"/><meta property="og:site_name" content="ISPmail Guide"/><meta name="twitter:card" content="summary_large_image"/><script>
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<style>@layer starlight.components{:root{--sl-badge-default-border: var(--sl-color-accent);--sl-badge-default-bg: var(--sl-color-accent-low);--sl-badge-default-text: #fff;--sl-badge-note-border: var(--sl-color-blue);--sl-badge-note-bg: var(--sl-color-blue-low);--sl-badge-note-text: #fff;--sl-badge-danger-border: var(--sl-color-red);--sl-badge-danger-bg: var(--sl-color-red-low);--sl-badge-danger-text: #fff;--sl-badge-success-border: var(--sl-color-green);--sl-badge-success-bg: var(--sl-color-green-low);--sl-badge-success-text: #fff;--sl-badge-caution-border: var(--sl-color-orange);--sl-badge-caution-bg: var(--sl-color-orange-low);--sl-badge-caution-text: #fff;--sl-badge-tip-border: var(--sl-color-purple);--sl-badge-tip-bg: var(--sl-color-purple-low);--sl-badge-tip-text: #fff}[data-theme=light]:root{--sl-badge-default-bg: var(--sl-color-accent-high);--sl-badge-note-bg: var(--sl-color-blue-high);--sl-badge-danger-bg: var(--sl-color-red-high);--sl-badge-success-bg: var(--sl-color-green-high);--sl-badge-caution-bg: var(--sl-color-orange-high);--sl-badge-tip-bg: var(--sl-color-purple-high)}.sl-badge:where(.astro-avdet4wd){display:inline-block;border:1px solid var(--sl-color-border-badge);border-radius:.25rem;font-family:var(--sl-font-system-mono);line-height:normal;color:var(--sl-color-text-badge);background-color:var(--sl-color-bg-badge);overflow-wrap:anywhere}.sidebar-content .sl-badge:where(.astro-avdet4wd){line-height:1;font-size:var(--sl-text-xs);padding:.125rem .375rem}.sidebar-content a[aria-current=page]>.sl-badge:where(.astro-avdet4wd){--sl-color-bg-badge: transparent;--sl-color-border-badge: currentColor;color:inherit}.default:where(.astro-avdet4wd){--sl-color-bg-badge: var(--sl-badge-default-bg);--sl-color-border-badge: var(--sl-badge-default-border);--sl-color-text-badge: var(--sl-badge-default-text)}.note:where(.astro-avdet4wd){--sl-color-bg-badge: var(--sl-badge-note-bg);--sl-color-border-badge: var(--sl-badge-note-border);--sl-color-text-badge: var(--sl-badge-note-text)}.danger:where(.astro-avdet4wd){--sl-color-bg-badge: var(--sl-badge-danger-bg);--sl-color-border-badge: var(--sl-badge-danger-border);--sl-color-text-badge: var(--sl-badge-danger-text)}.success:where(.astro-avdet4wd){--sl-color-bg-badge: var(--sl-badge-success-bg);--sl-color-border-badge: var(--sl-badge-success-border);--sl-color-text-badge: var(--sl-badge-success-text)}.tip:where(.astro-avdet4wd){--sl-color-bg-badge: var(--sl-badge-tip-bg);--sl-color-border-badge: var(--sl-badge-tip-border);--sl-color-text-badge: var(--sl-badge-tip-text)}.caution:where(.astro-avdet4wd){--sl-color-bg-badge: var(--sl-badge-caution-bg);--sl-color-border-badge: var(--sl-badge-caution-border);--sl-color-text-badge: var(--sl-badge-caution-text)}.small:where(.astro-avdet4wd){font-size:var(--sl-text-xs);padding:.125rem .25rem}.medium:where(.astro-avdet4wd){font-size:var(--sl-text-sm);padding:.175rem .35rem}.large:where(.astro-avdet4wd){font-size:var(--sl-text-base);padding:.225rem .45rem}.sl-markdown-content :is(h1,h2,h3,h4,h5,h6) .sl-badge:where(.astro-avdet4wd){vertical-align:middle}}
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@layer starlight.components{.card:where(.astro-v5tidmuc){--sl-card-border: var(--sl-color-purple);--sl-card-bg: var(--sl-color-purple-low);border:1px solid var(--sl-color-gray-5);background-color:var(--sl-color-black);padding:clamp(1rem,calc(.125rem + 3vw),2.5rem);flex-direction:column;gap:clamp(.5rem,calc(.125rem + 1vw),1rem)}.card:where(.astro-v5tidmuc):nth-child(4n+1){--sl-card-border: var(--sl-color-orange);--sl-card-bg: var(--sl-color-orange-low)}.card:where(.astro-v5tidmuc):nth-child(4n+3){--sl-card-border: var(--sl-color-green);--sl-card-bg: var(--sl-color-green-low)}.card:where(.astro-v5tidmuc):nth-child(4n+4){--sl-card-border: var(--sl-color-red);--sl-card-bg: var(--sl-color-red-low)}.card:where(.astro-v5tidmuc):nth-child(4n+5){--sl-card-border: var(--sl-color-blue);--sl-card-bg: var(--sl-color-blue-low)}.title:where(.astro-v5tidmuc){font-weight:600;font-size:var(--sl-text-h4);color:var(--sl-color-white);line-height:var(--sl-line-height-headings);gap:1rem;align-items:center}.card:where(.astro-v5tidmuc) .icon:where(.astro-v5tidmuc){border:1px solid var(--sl-card-border);background-color:var(--sl-card-bg);padding:.2em;border-radius:.25rem;flex-shrink:0}.card:where(.astro-v5tidmuc) .body:where(.astro-v5tidmuc){margin:0;font-size:clamp(var(--sl-text-sm),calc(.5rem + 1vw),var(--sl-text-body))}}
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@layer starlight.components{svg:where(.astro-c6vsoqas){color:var(--sl-icon-color);font-size:var(--sl-icon-size, 1em);width:1em;height:1em}}
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@layer starlight.components{starlight-tabs:where(.astro-esqgolmp){display:block}.tablist-wrapper:where(.astro-esqgolmp){overflow-x:auto}:where(.astro-esqgolmp)[role=tablist]{display:flex;list-style:none;border-bottom:2px solid var(--sl-color-gray-5);padding:0}.tab:where(.astro-esqgolmp){margin-bottom:-2px}.tab:where(.astro-esqgolmp)>:where(.astro-esqgolmp)[role=tab]{display:flex;align-items:center;gap:.5rem;padding:0 1.25rem;text-decoration:none;border-bottom:2px solid var(--sl-color-gray-5);color:var(--sl-color-gray-3);outline-offset:var(--sl-outline-offset-inside);overflow-wrap:initial}.tab:where(.astro-esqgolmp) :where(.astro-esqgolmp)[role=tab][aria-selected=true]{color:var(--sl-color-white);border-color:var(--sl-color-text-accent);font-weight:600}.tablist-wrapper:where(.astro-esqgolmp)~[role=tabpanel]{margin-top:1rem}}
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@layer starlight.components{.sl-steps{--bullet-size: calc(var(--sl-line-height) * 1rem);--bullet-margin: .375rem;list-style:none;counter-reset:steps-counter var(--sl-steps-start, 0);padding-inline-start:0}.sl-steps>li{counter-increment:steps-counter;position:relative;padding-inline-start:calc(var(--bullet-size) + 1rem);padding-bottom:1px;min-height:calc(var(--bullet-size) + var(--bullet-margin))}.sl-steps>li+li{margin-top:0}.sl-steps>li:before{content:counter(steps-counter);position:absolute;top:0;inset-inline-start:0;width:var(--bullet-size);height:var(--bullet-size);line-height:var(--bullet-size);font-size:var(--sl-text-xs);font-weight:600;text-align:center;color:var(--sl-color-white);background-color:var(--sl-color-gray-6);border-radius:99rem;box-shadow:inset 0 0 0 1px var(--sl-color-gray-5)}.sl-steps>li:after{--guide-width: 1px;content:"";position:absolute;top:calc(var(--bullet-size) + var(--bullet-margin));bottom:var(--bullet-margin);inset-inline-start:calc((var(--bullet-size) - var(--guide-width)) / 2);width:var(--guide-width);background-color:var(--sl-color-hairline-light)}}@layer starlight.content{.sl-steps>li>:first-child{--lh: calc(1em * var(--sl-line-height));--shift-y: calc(.5 * (var(--bullet-size) - var(--lh)));transform:translateY(var(--shift-y));margin-bottom:var(--shift-y)}.sl-steps>li>:first-child:where(h1,h2,h3,h4,h5,h6){--lh: calc(1em * var(--sl-line-height-headings))}@supports (--prop: 1lh){.sl-steps>li>:first-child{--lh: 1lh}}}
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@layer starlight.components{starlight-file-tree:where(.astro-p67cqifm){--x-space: 1.5rem;--y-space: .125rem;--y-pad: 0;display:block;border:1px solid var(--sl-color-gray-5);padding:1rem;background-color:var(--sl-color-gray-6);font-size:var(--sl-text-xs);font-family:var(--__sl-font-mono);overflow-x:auto}starlight-file-tree:where(.astro-p67cqifm) .directory>details{border:0;padding:0;padding-inline-start:var(--x-space);background:transparent}starlight-file-tree:where(.astro-p67cqifm) .directory>details>summary{margin-inline-start:calc(-1 * var(--x-space));border:0;padding:var(--y-pad) .625rem;font-weight:400;color:var(--sl-color-white);max-width:100%}starlight-file-tree:where(.astro-p67cqifm) .directory>details>summary::marker,starlight-file-tree:where(.astro-p67cqifm) .directory>details>summary::-webkit-details-marker{color:var(--sl-color-gray-3)}starlight-file-tree:where(.astro-p67cqifm) .directory>details>summary:hover,starlight-file-tree:where(.astro-p67cqifm) .directory>details>summary:hover .tree-icon{cursor:pointer;color:var(--sl-color-text-accent);fill:currentColor}starlight-file-tree:where(.astro-p67cqifm) .directory>details>summary:hover~ul{border-color:var(--sl-color-gray-4)}starlight-file-tree:where(.astro-p67cqifm) .directory>details>summary:hover .highlight .tree-icon{color:var(--sl-color-text-invert);fill:currentColor}starlight-file-tree:where(.astro-p67cqifm) ul{margin-inline-start:.5rem;border-inline-start:1px solid var(--sl-color-gray-5);padding:0;padding-inline-start:.125rem;list-style:none}starlight-file-tree:where(.astro-p67cqifm)>ul{margin:0;border:0;padding:0}starlight-file-tree:where(.astro-p67cqifm) li{margin:var(--y-space) 0;padding:var(--y-pad) 0}starlight-file-tree:where(.astro-p67cqifm) .file{margin-inline-start:calc(var(--x-space) - .125rem);color:var(--sl-color-white)}starlight-file-tree:where(.astro-p67cqifm) .tree-entry{display:inline-flex;align-items:flex-start;flex-wrap:wrap;max-width:calc(100% - 1rem)}@media(min-width:30em){starlight-file-tree:where(.astro-p67cqifm) .tree-entry{flex-wrap:nowrap}}starlight-file-tree:where(.astro-p67cqifm) .tree-entry>:first-child{flex-shrink:0}starlight-file-tree:where(.astro-p67cqifm) .empty{color:var(--sl-color-gray-3);padding-inline-start:.375rem}starlight-file-tree:where(.astro-p67cqifm) .comment{color:var(--sl-color-gray-3);padding-inline-start:1.625rem;max-width:24rem;min-width:12rem}starlight-file-tree:where(.astro-p67cqifm) .highlight{display:inline-block;border-radius:.25rem;padding-inline-end:.5rem;color:var(--sl-color-text-invert);background-color:var(--sl-color-text-accent)}starlight-file-tree:where(.astro-p67cqifm) svg{display:inline;fill:var(--sl-color-gray-3);vertical-align:middle;margin-inline:.25rem .375rem;width:.875rem;height:.875rem}starlight-file-tree:where(.astro-p67cqifm) .highlight svg.tree-icon{fill:currentColor}}
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@layer starlight.components{.sl-link-button:where(.astro-xwgiixxa){align-items:center;border:1px solid transparent;border-radius:999rem;display:inline-flex;font-size:var(--sl-text-sm);gap:.5em;line-height:1.1875;outline-offset:.25rem;padding:.4375rem 1.125rem;text-decoration:none}.sl-link-button:where(.astro-xwgiixxa).primary{background:var(--sl-color-text-accent);border-color:var(--sl-color-text-accent);color:var(--sl-color-black)}.sl-link-button:where(.astro-xwgiixxa).primary:hover{color:var(--sl-color-black)}.sl-link-button:where(.astro-xwgiixxa).secondary{border-color:inherit;color:var(--sl-color-white)}.sl-link-button:where(.astro-xwgiixxa).minimal{color:var(--sl-color-white);padding-inline:0}.sl-link-button:where(.astro-xwgiixxa) svg{flex-shrink:0}@media(min-width:50rem){.sl-link-button:where(.astro-xwgiixxa){font-size:var(--sl-text-base);padding:.9375rem 1.25rem}}.sl-markdown-content .sl-link-button:where(.astro-xwgiixxa){margin-inline-end:1rem}.sl-markdown-content .sl-link-button:where(.astro-xwgiixxa):not(:where(p *)){margin-block:1rem}}
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</style><script type="module" src="/_astro/page.B1D-nYk3.js"></script></head> <body class="astro-bguv2lll"> <a href="#_top" class="astro-7q3lir66">Skip to content</a> <div class="page sl-flex astro-vrdttmbt"> <header class="header astro-vrdttmbt"><div class="header astro-kmkmnagf"> <div class="title-wrapper sl-flex astro-kmkmnagf"> <a href="/" class="site-title sl-flex astro-m46x6ez3"> <img class="light:sl-hidden print:hidden astro-m46x6ez3" alt src="/_astro/logo-dark.DlBk_-6-.svg" width="146" height="37"> <img class="dark:sl-hidden print:block astro-m46x6ez3" alt src="/_astro/logo.DfR9nmxN.svg" width="146" height="37"> <span class="sr-only astro-m46x6ez3" translate="no"> ISPmail Guide </span> </a> </div> <div class="sl-flex print:hidden astro-kmkmnagf"> <site-search class="astro-kmkmnagf astro-v37mnknz" data-translations="{"placeholder":"Search"}"> <button data-open-modal disabled aria-label="Search" aria-keyshortcuts="Control+K" class="astro-v37mnknz"> <svg aria-hidden="true" class="astro-v37mnknz astro-c6vsoqas" width="16" height="16" viewBox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1em;"><path d="M21.71 20.29 18 16.61A9 9 0 1 0 16.61 18l3.68 3.68a.999.999 0 0 0 1.42 0 1 1 0 0 0 0-1.39ZM11 18a7 7 0 1 1 0-14 7 7 0 0 1 0 14Z"/></svg> <span class="sl-hidden md:sl-block astro-v37mnknz" aria-hidden="true">Search</span> <kbd class="sl-hidden md:sl-flex astro-v37mnknz" style="display: none;"> <kbd class="astro-v37mnknz">Ctrl</kbd><kbd class="astro-v37mnknz">K</kbd> </kbd> </button> <dialog style="padding:0" aria-label="Search" class="astro-v37mnknz"> <div class="dialog-frame sl-flex astro-v37mnknz"> <button data-close-modal class="sl-flex md:sl-hidden astro-v37mnknz"> Cancel </button> <div class="search-container astro-v37mnknz"> <div id="starlight__search" class="astro-v37mnknz"></div> </div> </div> </dialog> </site-search> <script>
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(() => {
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const openBtn = document.querySelector('button[data-open-modal]');
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const shortcut = openBtn?.querySelector('kbd');
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platformKey.textContent = '⌘';
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openBtn.setAttribute('aria-keyshortcuts', 'Meta+K');
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shortcut.style.display = '';
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})();
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</script> <ul class="top-level astro-3ii7xxms"> <li class="astro-3ii7xxms"> <details open class="astro-3ii7xxms"> <sl-sidebar-restore data-index="0"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <span class="group-label astro-3ii7xxms"> <span class="large astro-3ii7xxms">ISPmail for Debian 13</span> </span> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewBox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"><path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z"/></svg> </summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"> <a href="/ispmail-trixie/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Start here</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/upgrading/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Upgrading from Debian Bookworm</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/install-debian/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Installing Debian</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/install-the-software-packages/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Install software packages</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/virtual-domains/" aria-current="page" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Virtual domains</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/database/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Database setup</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/overview/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Big picture</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/dns-records/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">DNS records</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/tls-certificate/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">TLS certificate</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/postfix/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Postfix</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/dovecot/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Dovecot</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/lmtp/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">LMTP</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/webmail/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Webmail using Roundcube</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/relaying/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Sending / Relaying</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/imap/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">IMAP</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/managing-users-aliases-and-domains/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Managing users, aliases and domains</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/catching-spam-with-rspamd/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Catching spam with rspamd</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/anti-spoofing-dkim-spf/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Prevent spoofing using DKIM and SPF</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/catch-all/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Catch-all addresses</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/quotas/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Quotas</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/going-live/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Going live</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-trixie/automated-installation/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Automated installation</span> </a> </li> </ul> </details> </li><li class="astro-3ii7xxms"> <details open class="astro-3ii7xxms"> <sl-sidebar-restore data-index="1"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <span class="group-label astro-3ii7xxms"> <span class="large astro-3ii7xxms">ISPmail for Debian 12</span> </span> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewBox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"><path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z"/></svg> </summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Start here</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/whats-new/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">What's new</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/migrating-from-a-bullseye-to-a-bookworm-server/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Migrating from your old (Bullseye) server</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/big-picture/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">The big picture</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/types-of-email-domains/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Types of email domains</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/install-debian-bookworm-on-your-server/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Installing Debian</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/install-the-software-packages/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Install software packages</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/creating-a-tls-encryption-key-and-certificate/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">TLS certificate</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/prepare-the-database/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Preparing the database</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/making-postfix-get-its-information-from-the-mariadb-database/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Let Postfix access MariaDB</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/catchall-aliases/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Catch-all aliases</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/setting-up-dovecot/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Setting up Dovecot</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/let-postfix-send-emails-to-dovecot/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Let Postfix send emails to Dovecot</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/quotas/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Quotas</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/testing-imap/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Testing IMAP</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/webmail-using-roundcube/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Webmail using Roundcube</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/testing-email-delivery/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Testing email delivery</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/relaying-outgoing-emails-through-postfix/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Relaying outgoing emails through Postfix</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/catching-spam-with-rspamd/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Catching spam with rspamd</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/setting-dns-records/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Setting DNS records</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/prevent-spoofing-using-dkim/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Prevent spoofing using DKIM</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/managing-users-aliases-and-domains/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Managing users, aliases and domains</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/monitoring-and-backup/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Monitoring and Backup</span> </a> </li><li class="astro-3ii7xxms"> <a href="/ispmail-bookworm/automatic-installation-with-ansible/" aria-current="false" 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1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z"/></svg> </summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"> <a href="/article/updating-the-bios-on-lenovo-laptops-from-linux-using-a-usb-flash-stick/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Updating the BIOS on Lenovo laptops from Linux using a USB flash stick</span> </a> </li><li class="astro-3ii7xxms"> <a href="/bacula-cheatsheet/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Bareos/Bacula Cheat Sheet</span> </a> </li><li class="astro-3ii7xxms"> <a href="/debian-packages-are-so-old/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Debian packages are so old</span> </a> </li><li class="astro-3ii7xxms"> <a href="/getting-help-on-irc/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Getting help on IRC</span> </a> </li><li class="astro-3ii7xxms"> <a href="/linux/renaming-multiple-files/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Renaming multiple files</span> </a> </li><li class="astro-3ii7xxms"> <a href="/linuxtip/pipes/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Pipes and redirection</span> </a> </li><li class="astro-3ii7xxms"> <a href="/rsnapshot-and-usb-drives/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Backups with rsnaphot to external USB drives</span> </a> </li><li class="astro-3ii7xxms"> <a href="/squid-acls/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">How Squid ACLs work</span> </a> </li><li class="astro-3ii7xxms"> <a href="/understanding-lvm/" aria-current="false" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Understanding the Logical Volume Manager (LVM)</span> </a> </li> </ul> </details> </li> </ul> <script aria-hidden="true">
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||
domain is <code dir="auto">example.com</code>. If someone visits <code dir="auto">https://example.com/</code>, they might be greeted by the Roundcube webmail login
|
||
page.</p>
|
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<p>But your server doesn’t have to handle only one domain. You can have mailboxes on multiple domains like:</p>
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||
<ul>
|
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<li><code dir="auto">jack@example.com</code></li>
|
||
<li><code dir="auto">lucy@example.com</code></li>
|
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<li><code dir="auto">tina@example.org</code></li>
|
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<li><code dir="auto">jeff@example.net</code></li>
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</ul>
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<p>These are three different domains, and your server can handle them all.</p>
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<p>This is what <em>virtual domains</em> are for. You give your mail server a list of domains and email addresses and it will
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||
receive emails for them. Your users will also have passwords that they need to type in to retrieve their emails. You can
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||
even set up mailing lists that take messages sent to one address and forward them to several mailboxes at once.</p>
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||
<p>To make all this work, we’ll store the configuration in a small MariaDB database. Postfix, Dovecot, and Roundcube will
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all read from this database to know which domains exist, which mailboxes they have, and where each email should go. You
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will create that simple database on the next page.</p> </div> <footer> <footer class="sl-flex astro-3yyafb3n"> <div class="meta sl-flex astro-3yyafb3n"> <p>Last updated: <time datetime="2025-11-01T00:00:00.000Z">Nov 1, 2025</time></p> </div> <div class="pagination-links print:hidden astro-u2l5gyhi" dir="ltr"> <a href="/ispmail-trixie/install-the-software-packages/" rel="prev" class="astro-u2l5gyhi"> <svg aria-hidden="true" class="astro-u2l5gyhi astro-c6vsoqas" width="16" height="16" viewBox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.5rem;"><path d="M17 11H9.41l3.3-3.29a1.004 1.004 0 1 0-1.42-1.42l-5 5a1 1 0 0 0-.21.33 1 1 0 0 0 0 .76 1 1 0 0 0 .21.33l5 5a1.002 1.002 0 0 0 1.639-.325 1 1 0 0 0-.219-1.095L9.41 13H17a1 1 0 0 0 0-2Z"/></svg> <span class="astro-u2l5gyhi"> Previous <br class="astro-u2l5gyhi"> <span class="link-title astro-u2l5gyhi">Install software packages</span> </span> </a> <a href="/ispmail-trixie/database/" rel="next" class="astro-u2l5gyhi"> <svg aria-hidden="true" class="astro-u2l5gyhi astro-c6vsoqas" width="16" height="16" viewBox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.5rem;"><path d="M17.92 11.62a1.001 1.001 0 0 0-.21-.33l-5-5a1.003 1.003 0 1 0-1.42 1.42l3.3 3.29H7a1 1 0 0 0 0 2h7.59l-3.3 3.29a1.002 1.002 0 0 0 .325 1.639 1 1 0 0 0 1.095-.219l5-5a1 1 0 0 0 .21-.33 1 1 0 0 0 0-.76Z"/></svg> <span class="astro-u2l5gyhi"> Next <br class="astro-u2l5gyhi"> <span class="link-title astro-u2l5gyhi">Database setup</span> </span> </a> </div> </footer> <script defer src="https://comentario.workaround.org/comentario.js"></script>
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