Update Servers/Email/Mailcow.md

Servers/Email/Mailcow.md

@@ -41,6 +41,92 @@ docker-compose up -d
       - "${HTTP_BIND:-0.0.0.0}:${HTTP_PORT:-80}:${HTTP_PORT:-80}"
     ```
 
+### Reverse-Proxy Configuration
+For the purposes of this document, it will be assumed that you are deploying Mailcow behind Traefik.  You can use the following dynamic configuration file to achieve this:
+```yaml title="/srv/containers/traefik/config/dynamic/mail.bunny-lab.io.yml"
+tcp:
+  routers:
+    mailcow-smtp:
+      entryPoints:
+        - smtp
+      rule: "HostSNI(`mail.bunny-lab.io`)"
+      service: mailcow-smtp
+      tls:
+        passthrough: true
+
+    mailcow-smtps:
+      entryPoints:
+        - smtps
+      rule: "HostSNI(`mail.bunny-lab.io`)"
+      service: mailcow-smtps
+      tls:
+        passthrough: true
+
+    mailcow-submission:
+      entryPoints:
+        - submission
+      rule: "HostSNI(`mail.bunny-lab.io`)"
+      service: mailcow-submission
+      tls:
+        passthrough: true
+
+    mailcow-imaps:
+      entryPoints:
+        - imaps
+      rule: "HostSNI(`mail.bunny-lab.io`)"
+      service: mailcow-imaps
+      tls:
+        passthrough: true
+
+    mailcow-imap:
+      entryPoints:
+        - imap
+      rule: "HostSNI(`mail.bunny-lab.io`)"
+      service: mailcow-imap
+      tls:
+        passthrough: true
+
+    # Optional: POP3(s)
+    mailcow-pop3s:
+      entryPoints:
+        - pop3s
+      rule: "HostSNI(`mail.bunny-lab.io`)"
+      service: mailcow-pop3s
+      tls:
+        passthrough: true
+
+  services:
+    mailcow-smtp:
+      loadBalancer:
+        servers:
+          - address: "192.168.3.61:25"
+
+    mailcow-smtps:
+      loadBalancer:
+        servers:
+          - address: "192.168.3.61:465"
+
+    mailcow-submission:
+      loadBalancer:
+        servers:
+          - address: "192.168.3.61:587"
+
+    mailcow-imaps:
+      loadBalancer:
+        servers:
+          - address: "192.168.3.61:993"
+
+    mailcow-imap:
+      loadBalancer:
+        servers:
+          - address: "192.168.3.61:143"
+
+    mailcow-pop3s:
+      loadBalancer:
+        servers:
+          - address: "192.168.3.61:995"
+```
+
 ### Login to Mailcow
 At this point, the Mailcow server has been deployed so you can log into it.