[MM3-users] Re: list archives bleeding across domains.

Oct. 15, 2026

      Yes, ProxyPreserveHost is On
by way of the haproxy, where:
backend mailman3
  mode http
  option forwardfor if-none
  server server_mailman3 172.17.0.63:80

for context, this is the apache2 config:
&lt;VirtualHost *:80>
  ServerName lists02.campaignfoundations.com 
  ServerAlias lists.campaignfoundations.com
  ServerAdmin hesco@campaignfoundations.com

  Alias /mailman3/static "/opt/mailman/web/static"
  &lt;Location /mailman3/static>
    Require all granted
  &lt;/Location>

  &lt;IfModule mod_proxy.c>
    ProxyPreserveHost On
    ProxyPass "/mailman3/static" !
    ProxyPass "/mailman3/" "http://127.0.0.1:8000/mailman3/"
    ProxyPassReverse "/mailman3/" "http://127.0.0.1:8000/mailman3/"
    ProxyPass "/mailman3" "http://127.0.0.1:8000/mailman3"
    ProxyPass "/archives" "http://127.0.0.1:8000/archives"
    ProxyPass "/accounts" "http://127.0.0.1:8000/accounts"
    ProxyPass "/admin" "http://127.0.0.1:8000/admin"
    ProxyPass "/user-profile" "http://127.0.0.1:8000/user-profile"
  &lt;/IfModule>

  # Possible values include: debug, info, notice, warn, error, crit, alert, emerg.
  LogLevel warn
  LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" common
  CustomLog /var/log/apache2/lists02.campaignfoundations.com-access.log combined
  ErrorLog /var/log/apache2/lists02.campaignfoundations.com-error.log

&lt;/VirtualHost>

Mark Sapiro wrote:
...
...
This should work. How is your web server accessing Postorius? Is it
passing the hostname? I.e., proxy_set_header Host $host; for nginx or
ProxyPreserveHost On for Apache.
Mark Sapiro <mark@msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

[MM3-users] Re: list archives bleeding across domains.

Hugh Esco

This should work. How is your web server accessing Postorius? Is it passing the hostname? I.e., proxy_set_header Host $host; for nginx or ProxyPreserveHost On for Apache.