diff --git a/03frontends.cfg b/03frontends.cfg
index 9ab9a16..325c32f 100644
--- a/03frontends.cfg
+++ b/03frontends.cfg
@@ -311,7 +311,6 @@ frontend frontend_default
   acl laminar hdr(host) -i laminar.benoit.jp.net
   acl linkding hdr(host) -i linkding.benoit.jp.net
   acl mailcow hdr(host) -i mail.benoit.jp.net
-  acl mailcow-backup hdr(host) -i mail-backup.benoit.jp.net
   acl mastodon hdr(host) -i mastodon.benoit.jp.net
   acl miniflux hdr(host) -i miniflux.benoit.jp.net
   acl navidrome hdr(host) -i navidrome.benoit.jp.net
@@ -328,7 +327,6 @@ frontend frontend_default
   http-request deny if beszel !letsencrypt !allowed_ips
   http-request deny if kanboard !letsencrypt !allowed_ips
   http-request deny if mailcow !letsencrypt !allowed_ips
-  http-request deny if mailcow-backup !letsencrypt !allowed_ips
   http-request deny if miniflux !letsencrypt !allowed_ips
   http-request deny if navidrome !JP !letsencrypt !allowed_ips
   http-request deny if photoprism !JP !FR !letsencrypt !allowed_ips
diff --git a/05backends.cfg b/05backends.cfg
index 5c69848..7f1228a 100644
--- a/05backends.cfg
+++ b/05backends.cfg
@@ -138,16 +138,6 @@ backend mailcow
   http-response set-header Cross-Origin-Resource-Policy "same-origin"
   server mailcow mailcow.incus:80 check
 
-backend mailcow-backup
-  # set HSTS for one year after all responses
-  http-response set-header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
-  # add some Security headers
-  http-response set-header X-Frame-Options "SAMEORIGIN"
-  http-response set-header X-Content-Type-Options "nosniff"
-  http-response set-header Referrer-Policy "strict-origin-when-cross-origin"
-  http-response set-header Cross-Origin-Resource-Policy "same-origin"
-  server mailcow-backup mxmon:443 check ssl verify none
-
 backend beszel
   # set HSTS for one year after all responses
   http-response set-header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"