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Recover crashed Aria storage engine
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Remove Persistent Data
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Reset Passwords (incl. SQL)
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Blacklist / Whitelist
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Configuration
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CSS overrides
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Netfilter
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Pushover
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Spamfilter
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<a href="../../manual-guides/mailcow-UI/u_e-mailcow_ui-sub_addressing/" class="md-nav__link">
Sub-addressing
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<a href="../../manual-guides/mailcow-UI/u_e-mailcow_ui-tags/" class="md-nav__link">
Tags (for Domains and Mailboxes)
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<a href="../../manual-guides/mailcow-UI/u_e-mailcow_ui-spamalias/" class="md-nav__link">
Temporary email aliases
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<a href="../../manual-guides/mailcow-UI/u_e-mailcow_ui-tfa/" class="md-nav__link">
Two-Factor Authentication
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<a href="../../manual-guides/mailcow-UI/u_e-mailcow_ui-fido/" class="md-nav__link">
WebAuthn / FIDO2
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Postfix
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<a href="../../manual-guides/Postfix/u_e-postfix-trust_networks/" class="md-nav__link">
Add trusted networks
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</li>
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<a href="../../manual-guides/Postfix/u_e-postfix-custom_transport/" class="md-nav__link">
Custom transport maps
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<li class="md-nav__item">
<a href="../../manual-guides/Postfix/u_e-postfix-extra_cf/" class="md-nav__link">
Customize/Expand main.cf
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<a href="../../manual-guides/Postfix/u_e-postfix-disable_sender_verification/" class="md-nav__link">
Disable Sender Addresses Verification
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Max. message size (attachment size)
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Relayhosts
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<a href="../../manual-guides/Postfix/u_e-postfix-pflogsumm/" class="md-nav__link">
Statistics with pflogsumm
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Whitelist IP in Postscreen
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Unbound
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Unbound
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Using an external DNS service
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Dovecot
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Dovecot
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<ul class="md-nav__list" data-md-scrollfix>
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Customize/Expand dovecot.conf
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</li>
<li class="md-nav__item">
<a href="../../manual-guides/Dovecot/u_e-dovecot-any_acl/" class="md-nav__link">
Enable "any" ACL settings
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<li class="md-nav__item">
<a href="../../manual-guides/Dovecot/u_e-dovecot-expunge/" class="md-nav__link">
Expunge a Users mails
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<a href="../../manual-guides/Dovecot/u_e-dovecot-fts/" class="md-nav__link">
FTS (Solr)
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IMAP IDLE interval
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</li>
<li class="md-nav__item">
<a href="../../manual-guides/Dovecot/u_e-dovecot-mail-crypt/" class="md-nav__link">
Mail crypt
</a>
</li>
<li class="md-nav__item">
<a href="../../manual-guides/Dovecot/u_e-dovecot-more/" class="md-nav__link">
More Examples with DOVEADM
</a>
</li>
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<a href="../../manual-guides/Dovecot/u_e-dovecot-vmail-volume/" class="md-nav__link">
Move Maildir (vmail)
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</li>
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<a href="../../manual-guides/Dovecot/u_e-dovecot-public_folder/" class="md-nav__link">
Public folders
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<a href="../../manual-guides/Dovecot/u_e-dovecot-static_master/" class="md-nav__link">
Static master user
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Vacation replies for catchall addresses
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Nginx
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Nginx
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<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../../manual-guides/Nginx/u_e-nginx_webmail-site/" class="md-nav__link">
Create subdomain webmail.example.org
</a>
</li>
<li class="md-nav__item">
<a href="../../manual-guides/Nginx/u_e-nginx_custom/" class="md-nav__link">
Custom sites
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Watchdog
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Watchdog
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<ul class="md-nav__list" data-md-scrollfix>
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<a href="../../manual-guides/Watchdog/u_e-watchdog-thresholds/" class="md-nav__link">
Thresholds
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Redis
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<li class="md-nav__item">
<a href="../../manual-guides/Rspamd/u_e-rspamd/" class="md-nav__link">
Rspamd
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ClamAV
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<nav class="md-nav" data-md-level="2" aria-labelledby="__nav_8_9_label" aria-expanded="false">
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ClamAV
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<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../../manual-guides/ClamAV/u_e-clamav-whitelist/" class="md-nav__link">
Whitelist
</a>
</li>
<li class="md-nav__item">
<a href="../../manual-guides/ClamAV/u_e-clamav-additional_dbs/" class="md-nav__link">
Additional Databases
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SOGo
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Docker
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Docker
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Customize Dockerfiles
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<a href="../../manual-guides/u_e-why_unbound/" class="md-nav__link">
Why unbound?
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<a href="../../manual-guides/u_e-autodiscover_config/" class="md-nav__link">
Autodiscover / Autoconfig
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<a href="../../manual-guides/u_e-80_to_443/" class="md-nav__link">
Redirect HTTP to HTTPS
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<a href="../../manual-guides/u_e-reeanble-weak-protocols/" class="md-nav__link">
Re-enable TLS 1.0 and TLS 1.1
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<li class="md-nav__item">
<a href="../../manual-guides/u_e-update-hooks/" class="md-nav__link">
Run scripts before and after updates
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Client Configuration
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Client Configuration
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Overview
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Android
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Apple macOS / iOS
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eM Client
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KDE Kontact
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Microsoft Outlook
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Mozilla Thunderbird
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Windows Mail
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Manual configuration
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Third party apps
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<li class="md-nav__item">
<a href="#lets-encrypt-out-of-the-box" class="md-nav__link">
Let's Encrypt (out-of-the-box)
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<li class="md-nav__item">
<a href="#additional-domain-names" class="md-nav__link">
Additional domain names
</a>
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<li class="md-nav__item">
<a href="#force-renewal" class="md-nav__link">
Force renewal
</a>
</li>
<li class="md-nav__item">
<a href="#validation-errors-and-how-to-skip-validation" class="md-nav__link">
Validation errors and how to skip validation
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Disable Let's Encrypt
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Disable Let's Encrypt completely
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Skip all names but ${MAILCOW_HOSTNAME}
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<a href="#the-lets-encrypt-subjectaltname-limit-of-100-domains" class="md-nav__link">
The Let's Encrypt subjectAltName limit of 100 domains
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How to use your own certificate
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Test against staging ACME directory
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Custom directory URL
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<article class="md-content__inner md-typeset">
<h1>Advanced SSL</h1>
<h2 id="lets-encrypt-out-of-the-box">Let's Encrypt (out-of-the-box)<a class="headerlink" href="#lets-encrypt-out-of-the-box" title="Permanent link">&para;</a></h2>
<p>The "acme-mailcow" container will try to obtain a LE certificate for <code>${MAILCOW_HOSTNAME}</code>, <code>autodiscover.ADDED_MAIL_DOMAIN</code> and <code>autoconfig.ADDED_MAIL_DOMAIN</code>.</p>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>mailcow <strong>must</strong> be available on port 80 for the acme-client to work. Our reverse proxy example configurations do cover that. You can also use any external ACME client (certbot for example) to obtain certificates, but you will need to make sure, that they are copied to the correct location and a post-hook reloads affected containers. See more in the Reverse Proxy documentation.</p>
</div>
<p>By default, which means <strong>0 domains</strong> are added to mailcow, it will try to obtain a certificate for <code>${MAILCOW_HOSTNAME}</code>.</p>
<p>For each domain you add, it will try to resolve <code>autodiscover.ADDED_MAIL_DOMAIN</code> and <code>autoconfig.ADDED_MAIL_DOMAIN</code> to its IPv6 address or - if IPv6 is not configured in your domain - IPv4 address. If it succeeds, a name will be added as SAN to the certificate request.</p>
<p>Only names that can be validated, will be added as SAN.</p>
<p>For every domain you remove, the certificate will be moved and a new certificate will be requested. It is not possible to keep domains in a certificate, when we are not able validate the challenge for those.</p>
<p>If you want to re-run the ACME client, use the following command:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="1:2"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><input id="__tabbed_1_2" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">docker compose (Plugin)</label><label for="__tabbed_1_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>restart<span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>restart<span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
</div>
</div>
<p>Monitor its logs with:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="2:2"><input checked="checked" id="__tabbed_2_1" name="__tabbed_2" type="radio" /><input id="__tabbed_2_2" name="__tabbed_2" type="radio" /><div class="tabbed-labels"><label for="__tabbed_2_1">docker compose (Plugin)</label><label for="__tabbed_2_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>logs<span class="w"> </span>--tail<span class="o">=</span><span class="m">200</span><span class="w"> </span>-f<span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>logs<span class="w"> </span>--tail<span class="o">=</span><span class="m">200</span><span class="w"> </span>-f<span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
</div>
</div>
<h3 id="additional-domain-names">Additional domain names<a class="headerlink" href="#additional-domain-names" title="Permanent link">&para;</a></h3>
<p>Edit "mailcow.conf" and add a parameter <code>ADDITIONAL_SAN</code> like this:</p>
<p>Do not use quotes (<code>"</code>) and do not use spaces between the names!</p>
<div class="highlight"><pre><span></span><code>ADDITIONAL_SAN=smtp.*,cert1.example.com,cert2.example.org,whatever.*
</code></pre></div>
<p>Each name will be validated against its IPv6 address or - if IPv6 is not configured in your domain - IPv4 address.</p>
<p>A wildcard name like <code>smtp.*</code> will try to obtain a smtp.DOMAIN_NAME SAN for each domain added to mailcow.</p>
<p>Run the following command to recreate affected containers automatically:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="3:2"><input checked="checked" id="__tabbed_3_1" name="__tabbed_3" type="radio" /><input id="__tabbed_3_2" name="__tabbed_3" type="radio" /><div class="tabbed-labels"><label for="__tabbed_3_1">docker compose (Plugin)</label><label for="__tabbed_3_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<div class="admonition info">
<p class="admonition-title">Info</p>
<p>Using names other name <code>MAILCOW_HOSTNAME</code> to access the mailcow UI may need further configuration.</p>
</div>
<p>If you plan to use a server name that is not <code>MAILCOW_HOSTNAME</code> to access the mailcow UI (for example by adding <code>mail.*</code> to <code>ADDITIONAL_SAN</code> make sure to populate that name in mailcow.conf via <code>ADDITIONAL_SERVER_NAMES</code>. Names must be separated by commas and <strong>must not</strong> contain spaces. If you skip this step, mailcow may respond with an incorrect site.</p>
<div class="highlight"><pre><span></span><code>ADDITIONAL_SERVER_NAMES=webmail.domain.tld,other.example.tld
</code></pre></div>
<p>Run the command below to apply:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="4:2"><input checked="checked" id="__tabbed_4_1" name="__tabbed_4" type="radio" /><input id="__tabbed_4_2" name="__tabbed_4" type="radio" /><div class="tabbed-labels"><label for="__tabbed_4_1">docker compose (Plugin)</label><label for="__tabbed_4_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<h3 id="force-renewal">Force renewal<a class="headerlink" href="#force-renewal" title="Permanent link">&para;</a></h3>
<p>To force a renewal, you need to create a file named <code>force_renew</code> and restart the <code>acme-mailcow</code> container:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="5:2"><input checked="checked" id="__tabbed_5_1" name="__tabbed_5" type="radio" /><input id="__tabbed_5_2" name="__tabbed_5" type="radio" /><div class="tabbed-labels"><label for="__tabbed_5_1">docker compose (Plugin)</label><label for="__tabbed_5_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="nb">cd</span><span class="w"> </span>/opt/mailcow-dockerized
touch<span class="w"> </span>data/assets/ssl/force_renew
docker<span class="w"> </span>compose<span class="w"> </span>restart<span class="w"> </span>acme-mailcow
<span class="c1"># Now check the logs for a renewal</span>
docker<span class="w"> </span>compose<span class="w"> </span>logs<span class="w"> </span>--tail<span class="o">=</span><span class="m">200</span><span class="w"> </span>-f<span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="nb">cd</span><span class="w"> </span>/opt/mailcow-dockerized
touch<span class="w"> </span>data/assets/ssl/force_renew
docker-compose<span class="w"> </span>restart<span class="w"> </span>acme-mailcow
<span class="c1"># Now check the logs for a renewal</span>
docker-compose<span class="w"> </span>logs<span class="w"> </span>--tail<span class="o">=</span><span class="m">200</span><span class="w"> </span>-f<span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
</div>
</div>
<p>The file will be deleted automatically.</p>
<h3 id="validation-errors-and-how-to-skip-validation">Validation errors and how to skip validation<a class="headerlink" href="#validation-errors-and-how-to-skip-validation" title="Permanent link">&para;</a></h3>
<p>You can skip the <strong>IP verification</strong> by setting <code>SKIP_IP_CHECK=y</code> in mailcow.conf (no quotes). Be warned that a misconfiguration will get you ratelimited by Let's Encrypt! This is primarily useful for multi-IP setups where the IP check would return the incorrect source IP address. Due to using dynamic IPs for acme-mailcow, source NAT is not consistent over restarts.</p>
<p>If you encounter problems with "HTTP validation", but your IP address confirmation succeeds, you are most likely using firewalld, ufw or any other firewall, that disallows connections from <code>br-mailcow</code> to your external interface. Both firewalld and ufw disallow this by default. It is often not enough to just stop these firewall services. You'd need to stop mailcow, stop the firewall service, flush the chains and restart Docker.</p>
<p>You can also skip this validation method by setting <code>SKIP_HTTP_VERIFICATION=y</code> in "mailcow.conf". Be warned that this is discouraged. In most cases, the HTTP verification is skipped to workaround unknown NAT reflection issues, which are not resolved by ignoring this specific network misconfiguration. If you encounter problems generating TLSA records in the DNS overview within mailcow, you are most likely having issues with NAT reflection you should fix.</p>
<p>If you changed a SKIP_* parameter, run the command below to apply your changes:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="6:2"><input checked="checked" id="__tabbed_6_1" name="__tabbed_6" type="radio" /><input id="__tabbed_6_2" name="__tabbed_6" type="radio" /><div class="tabbed-labels"><label for="__tabbed_6_1">docker compose (Plugin)</label><label for="__tabbed_6_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<h3 id="disable-lets-encrypt">Disable Let's Encrypt<a class="headerlink" href="#disable-lets-encrypt" title="Permanent link">&para;</a></h3>
<h4 id="disable-lets-encrypt-completely">Disable Let's Encrypt completely<a class="headerlink" href="#disable-lets-encrypt-completely" title="Permanent link">&para;</a></h4>
<p>Set <code>SKIP_LETS_ENCRYPT=y</code> in "mailcow.conf" and recreate "acme-mailcow" with:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="7:2"><input checked="checked" id="__tabbed_7_1" name="__tabbed_7" type="radio" /><input id="__tabbed_7_2" name="__tabbed_7" type="radio" /><div class="tabbed-labels"><label for="__tabbed_7_1">docker compose (Plugin)</label><label for="__tabbed_7_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<h4 id="skip-all-names-but-mailcow_hostname">Skip all names but ${MAILCOW_HOSTNAME}<a class="headerlink" href="#skip-all-names-but-mailcow_hostname" title="Permanent link">&para;</a></h4>
<p>Add <code>ONLY_MAILCOW_HOSTNAME=y</code> to "mailcow.conf" and recreate "acme-mailcow" with:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="8:2"><input checked="checked" id="__tabbed_8_1" name="__tabbed_8" type="radio" /><input id="__tabbed_8_2" name="__tabbed_8" type="radio" /><div class="tabbed-labels"><label for="__tabbed_8_1">docker compose (Plugin)</label><label for="__tabbed_8_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<h3 id="the-lets-encrypt-subjectaltname-limit-of-100-domains">The Let's Encrypt subjectAltName limit of 100 domains<a class="headerlink" href="#the-lets-encrypt-subjectaltname-limit-of-100-domains" title="Permanent link">&para;</a></h3>
<p>Let's Encrypt currently has <a href="https://letsencrypt.org/docs/rate-limits/">a limit of 100 Domain Names per Certificate</a>.</p>
<p>By default, "acme-mailcow" will create a single SAN certificate for all validated domains
(see the <a href="#lets-encrypt-out-of-the-box">first section</a> and <a href="#additional-domain-names">Additional domain names</a>).
This provides best compatibility but means the Let's Encrypt limit exceeds if you add too many domains to a single mailcow installation.</p>
<p>To solve this, you can configure <code>ENABLE_SSL_SNI</code> to generate:</p>
<ul>
<li>A main server certificate with <code>MAILCOW_HOSTNAME</code> and all fully qualified domain names in the <code>ADDITIONAL_SAN</code> config</li>
<li>One additional certificate for each domain found in the database with autodiscover.<em>, autoconfig.</em> and any other <code>ADDITIONAL_SAN</code> configured in this format (subdomain.*).</li>
<li>Limitations: A certificate name <code>ADDITIONAL_SAN=test.example.com</code> will be added as SAN to the main certificate. A separate certificate/key pair will <strong>not</strong> be generated for this format.</li>
</ul>
<p>Postfix, Dovecot and Nginx will then serve these certificates with SNI.</p>
<p>Set <code>ENABLE_SSL_SNI=y</code> in "mailcow.conf" and recreate "acme-mailcow" with:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="9:2"><input checked="checked" id="__tabbed_9_1" name="__tabbed_9" type="radio" /><input id="__tabbed_9_2" name="__tabbed_9" type="radio" /><div class="tabbed-labels"><label for="__tabbed_9_1">docker compose (Plugin)</label><label for="__tabbed_9_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Not all clients support SNI, <a href="https://wiki.dovecot.org/SSL/SNIClientSupport">see Dovecot documentation</a> or <a href="https://en.wikipedia.org/wiki/Server_Name_Indication#Support">Wikipedia</a>.
You should make sure these clients use the <code>MAILCOW_HOSTNAME</code> for secure connections if you enable this feature.</p>
</div>
<p>Here is an example:</p>
<ul>
<li><code>MAILCOW_HOSTNAME=server.email.tld</code></li>
<li><code>ADDITIONAL_SAN=webmail.email.tld,mail.*</code></li>
<li>mailcow email domains: "domain1.tld" and "domain2.tld"</li>
</ul>
<p>The following certificates will be generated:</p>
<ul>
<li><code>server.email.tld, webmail.email.tld</code> -&gt; this is the default certificate, all clients can connect with these domains</li>
<li><code>mail.domain1.tld, autoconfig.domain1.tld, autodiscover.domain1.tld</code> -&gt; individual certificate for domain1.tld, cannot be used by clients without SNI support</li>
<li><code>mail.domain2.tld, autoconfig.domain2.tld, autodiscover.domain2.tld</code> -&gt; individual certificate for domain2.tld, cannot be used by clients without SNI support</li>
</ul>
<h3 id="how-to-use-your-own-certificate">How to use your own certificate<a class="headerlink" href="#how-to-use-your-own-certificate" title="Permanent link">&para;</a></h3>
<p>Make sure you disable mailcows internal LE client (see above).</p>
<p>To use your own certificates, just save the combined certificate (containing the certificate and intermediate CA/CA if any) to <code>data/assets/ssl/cert.pem</code> and the corresponding key to <code>data/assets/ssl/key.pem</code>.</p>
<p><strong>IMPORTANT:</strong> Do not use symbolic links! Make sure you copy the certificates and do not link them to <code>data/assets/ssl</code>.</p>
<p>Restart affected services afterwards:</p>
<div class="highlight"><pre><span></span><code>docker restart $(docker ps -qaf name=postfix-mailcow)
docker restart $(docker ps -qaf name=nginx-mailcow)
docker restart $(docker ps -qaf name=dovecot-mailcow)
</code></pre></div>
<p>See <a href="../firststeps-rp/#optional-post-hook-script-for-non-mailcow-acme-clients">Post-hook script for non-mailcow ACME clients</a> for a full example script.</p>
<h3 id="test-against-staging-acme-directory">Test against staging ACME directory<a class="headerlink" href="#test-against-staging-acme-directory" title="Permanent link">&para;</a></h3>
<p>Edit <code>mailcow.conf</code> and add <code>LE_STAGING=y</code>.</p>
<p>Run the command below to activate your changes:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="10:2"><input checked="checked" id="__tabbed_10_1" name="__tabbed_10" type="radio" /><input id="__tabbed_10_2" name="__tabbed_10" type="radio" /><div class="tabbed-labels"><label for="__tabbed_10_1">docker compose (Plugin)</label><label for="__tabbed_10_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<h3 id="custom-directory-url">Custom directory URL<a class="headerlink" href="#custom-directory-url" title="Permanent link">&para;</a></h3>
<p>Edit <code>mailcow.conf</code> and add the corresponding directory URL to the new variable <code>DIRECTORY_URL</code>:</p>
<div class="highlight"><pre><span></span><code>DIRECTORY_URL=https://acme-custom-v9000.api.letsencrypt.org/directory
</code></pre></div>
<p>You cannot use <code>LE_STAGING</code> with <code>DIRECTORY_URL</code>. If both are set, only <code>LE_STAGING</code> is used.</p>
<p>Run the command below to activate your changes:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="11:2"><input checked="checked" id="__tabbed_11_1" name="__tabbed_11" type="radio" /><input id="__tabbed_11_2" name="__tabbed_11" type="radio" /><div class="tabbed-labels"><label for="__tabbed_11_1">docker compose (Plugin)</label><label for="__tabbed_11_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</div>
</div>
</div>
<h3 id="check-your-configuration">Check your configuration<a class="headerlink" href="#check-your-configuration" title="Permanent link">&para;</a></h3>
<p>Run the command below to find out why a validation fails:</p>
<div class="tabbed-set tabbed-alternate" data-tabs="12:2"><input checked="checked" id="__tabbed_12_1" name="__tabbed_12" type="radio" /><input id="__tabbed_12_2" name="__tabbed_12" type="radio" /><div class="tabbed-labels"><label for="__tabbed_12_1">docker compose (Plugin)</label><label for="__tabbed_12_2">docker-compose (Standalone)</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>logs<span class="w"> </span>--tail<span class="o">=</span><span class="m">200</span><span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code>docker-compose<span class="w"> </span>logs<span class="w"> </span>--tail<span class="o">=</span><span class="m">200</span><span class="w"> </span>acme-mailcow
</code></pre></div>
</div>
</div>
</div>
<p>To check if nginx serves the correct certificate, simply use a browser of your choice and check the displayed certificate.</p>
<p>To check the certificate served by Postfix, Dovecot and Nginx we will use <code>openssl</code>:</p>
<div class="highlight"><pre><span></span><code># Connect via SMTP STARTTLS (587)
openssl s_client -starttls smtp -connect MAILCOW_HOSTNAME:587 | openssl x509 -noout -text
# Connect via SMTP (465)
openssl s_client -connect MAILCOW_HOSTNAME:465 | openssl x509 -noout -text
# Connect via IMAP STARTTLS (143)
openssl s_client -starttls imap -connect MAILCOW_HOSTNAME:143 | openssl x509 -noout -text
# Connect via IMAP (993)
openssl s_client -connect MAILCOW_HOSTNAME:993 | openssl x509 -noout -text
# Connect via HTTPS (443)
openssl s_client -connect MAILCOW_HOSTNAME:443 | openssl x509 -noout -text
</code></pre></div>
<p>To validate the expiry dates as returned by openssl against MAILCOW_HOSTNAME, you are able to use our helper script:</p>
<div class="highlight"><pre><span></span><code><span class="nb">cd</span><span class="w"> </span>/opt/mailcow-dockerized
bash<span class="w"> </span>helper-scripts/expiry-dates.sh
</code></pre></div>
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