Hello,

I wanted to install mailcow on my server. For this I wanted to use a ReverseProxy (apache). Problem is, if I create a ReverseProxy (with SSL), I cant access the website. I also had this problem with my other ReverseProxy, which I use for Mastodon. I could fix it by setting
<VirtualHost *:443> to <VirtualHost Listen social.domain.yt:443>

This doesn’t work for the mailcow server now. If I activate the apache config from the mailcow docs both ReverseProxy that exist on my server stop working (SSL) and I get following error: SSL_ERROR_RX_RECORD_TOO_LONG.

How can I fix this?
Here are my 2 apache configs:
Mailcow:

`<VirtualHost *:80>
  ServerName mail.domain.yt
  ServerAlias autodiscover.*
  ServerAlias autoconfig.*
  RewriteEngine on

  RewriteCond %{HTTPS} off
  RewriteRule ^/?(.*) https://%{HTTP_HOST}/$1 [R=301,L]

  ProxyPass / http://127.0.0.1:8080/
  ProxyPassReverse / http://127.0.0.1:8080/
  ProxyPreserveHost On
  ProxyAddHeaders On
  RequestHeader set X-Forwarded-Proto "http"
</VirtualHost>
<VirtualHost Listen mail.deko.yt:443>
  ServerName mail.domain.yt
  ServerAlias autodiscover.*
  ServerAlias autoconfig.*

  # You should proxy to a plain HTTP session to offload SSL processing
  ProxyPass /Microsoft-Server-ActiveSync http://127.0.0.1:8080/Microsoft-Server-ActiveSync connectiontimeout=4000
  ProxyPassReverse /Microsoft-Server-ActiveSync http://127.0.0.1:8080/Microsoft-Server-ActiveSync
  ProxyPass / http://127.0.0.1:8080/
  ProxyPassReverse / http://127.0.0.1:8080/
  ProxyPreserveHost On
  ProxyAddHeaders On
  RequestHeader set X-Forwarded-Proto "https"

  SSLCertificateFile /opt/mailcow-dockerized/data/assets/ssl/cert.pem
  SSLCertificateKeyFile /opt/mailcow-dockerized/data/assets/ssl/key.pem

  # Wenn Sie einen HTTPS-Host als Proxy verwenden möchten:
  #SSLProxyEngine On

  # Wenn Sie einen Proxy für einen nicht vertrauenswürdigen HTTPS-Host einrichten wollen:
  #SSLProxyVerify none
  #SSLProxyCheckPeerCN off
  #SSLProxyCheckPeerName off
  #SSLProxyCheckPeerExpire off
</VirtualHost>
`

Mastodon:

`<VirtualHost *:80>
   ServerAdmin ***
   ServerName social.domain.yt
   ServerAlias social.domain.yt
   Redirect Permanent / https://social.domain.yt/
</VirtualHost>

<VirtualHost Listen social.domain.yt:443>
   ServerAdmin ***
   ServerName social.domain.yt

   DocumentRoot /home/mastodon/live/public/
   <Directory "/home/mastodon/live/public">
    Options Indexes MultiViews FollowSymLinks
    AllowOverride None
    Require all granted
   </Directory>

   #### DONT USE THIS CRAP OUTSIDE A MODULE
   # Header always set Strict-Transport-Security "max-age=31536000"
   # Header always set Referrer-Policy "strict-origin-when-cross-origin"   
   #####
   <IfModule mod_headers.c>
        Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
        Header always set Referrer-Policy "strict-origin-when-cross-origin"   
   </IfModule>  

   SSLEngine on
   SSLHonorCipherOrder on
   SSLCipherSuite EECDH+AESGCM:AES256+EECDH:AES128+EECDH

   # SSLCipherSuite EECDH+AESGCM:AES256+EECDH:AES128+EECDH:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305

   SSLProxyEngine On                                                                                                                                                                

   # SSLCompression off
   # SSLSessionTickets off
   # SSLStaplingResponderTimeout 5
   # SSLStaplingReturnResponderErrors on 
   # SSLUseStapling on

SSLCertificateFile /etc/letsencrypt/live/social.domain.yt/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/social.domain.yt/privkey.pem
#SSLCertificateFile /root/cloudflare/deko.yt.pem
#SSLCertificateKeyFile /root/cloudflare/deko.yt.key
#Include /etc/letsencrypt/options-ssl-apache.conf
   
   <LocationMatch "^/(assets|avatars|emoji|headers|packs|sounds|system)>
      Header always set Cache-Control "public, max-age=31536000, immutable"
      Require all granted
   </LocationMatch>

   ProxyPreserveHost On
   RequestHeader set X-Forwarded-Proto "https"

#  This is definitely not the right way to do it, but I did test it.  
#  <Location /api/v1/streaming/>
#      RewriteEngine on
#      RewriteCond %{HTTP:UPGRADE} ^WebSocket$ [NC]
#      RewriteCond %{HTTP:CONNECTION} Upgrade$ [NC]
#      RewriteRule /api/v1/streaming/(.*) ws://localhost:4000/api/v1/streaming/$1 [P]
#   </Location>

#   ProxyPass / http://localhost:4000
#   ProxyPassReverse / http://localhost:4000/

   ProxyPass /500.html !
   ProxyPass /sw.js !
   ProxyPass /robots.txt !
   ProxyPass /manifest.json !
   ProxyPass /browserconfig.xml !
   ProxyPass /mask-icon.svg !
   ProxyPassMatch ^(/.*\.(png|ico)$) !
   ProxyPassMatch ^/(assets|avatars|emoji|headers|packs|sounds|system|.well-known/acme-challenge) !

####### These lines below are what I think is causing the error; it's some variation on this. 

   #ProxyPass /.well-known/ http://social.domain.yt/webfinger/.well-known/                                                                                                           
   #ProxyPassReverse /.well-known/ http://social.domain.yt/webfinger/.well-known/  

   ProxyPass /api/v1/streaming/ ws://localhost:4000/
   ProxyPassReverse /api/v1/streaming/ ws://localhost:4000/
   ProxyPass / http://localhost:3000/
   ProxyPassReverse / http://localhost:3000/

   ErrorDocument 500 /500.html
   ErrorDocument 501 /500.html
   ErrorDocument 502 /500.html
   ErrorDocument 503 /500.html
   ErrorDocument 504 /500.html
</VirtualHost>
`