diff --git a/el9/templates/deployment.yaml b/el9/templates/deployment.yaml
index 1235ea56a41d7f357c025c21475e967173fe8916..63cb7a16b285f797ccbeebaadb5637950e2c096d 100644
--- a/el9/templates/deployment.yaml
+++ b/el9/templates/deployment.yaml
@@ -62,7 +62,7 @@ spec:
         checksum/php-config: {{ include (print $.Template.BasePath "/php-configmap.yaml") . | sha256sum }}
         checksum/php-fpm-config: {{ include (print $.Template.BasePath "/php-fpm-configmap.yaml") . | sha256sum }}
         checksum/php-fpm-config: {{ include (print $.Template.BasePath "/php-fpm-pool-configmap.yaml") . | sha256sum }}
-        checksum/mailrc-config: {{ include (print $.Template.BasePath "/mailrc-configmap.yaml") . | sha256sum }}
+        checksum/mail-config: {{ include (print $.Template.BasePath "/mail-configmap.yaml") . | sha256sum }}
     spec:
       {{- if .Values.nodeSelector }}
       nodeSelector: {{- .Values.nodeSelector | toYaml | nindent 8 }}
@@ -151,9 +151,10 @@ spec:
             # mount only `httpd.conf`, to avoid hiding other files installed by the image
             # inside `/etc/httpd/conf/`
             subPath: httpd.conf
-          - name: mailrc-config
-            mountPath: /etc/mail.rc
-            subPath: mail.rc
+          - name: mail-config
+            mountPath: /etc/s-nail.rc
+            subPath: s-nail.rc
+            readOnly: true
           # emptyDir for OIDC cache
           - name: oidc-cache
             mountPath: /var/cache/httpd/mod_auth_openidc/cache
@@ -191,9 +192,10 @@ spec:
           - name: php-fpm-pool-config
             mountPath: /etc/php-fpm.d/www.conf
             subPath: www.conf
-          - name: mailrc-config
-            mountPath: /etc/mail.rc
-            subPath: mail.rc
+          - name: mail-config
+            mountPath: /etc/s-nail.rc
+            subPath: s-nail.rc
+            readOnly: true
           # emptyDir for php-fpm socket
           - name: php-fpm-socket
             mountPath: /var/run/php-fpm
@@ -326,9 +328,9 @@ spec:
         - name: php-fpm-pool-config
           configMap:
             name: php-fpm-pool-config-{{ .Release.Name}}
-        - name: mailrc-config
+        - name: mail-config
           configMap:
-            name: mailrc-config-{{ .Release.Name}}
+            name: mail-config-{{ .Release.Name}}
         # We put OIDC cache in an emptyDir rather than in the container's filesystem in order to make it persistent
         # between the restarts of the httpd container (in the same pod), e.g. if httpd runs OOM or crashes or node reboots unexpectedly.
         - name: oidc-cache
diff --git a/el9/templates/mailrc-configmap.yaml b/el9/templates/mail-configmap.yaml
similarity index 97%
rename from el9/templates/mailrc-configmap.yaml
rename to el9/templates/mail-configmap.yaml
index a17d61c96dcc58e7fd3585db3ca1265136d2942e..6c614bc7ab4b23da2288c6aa1b7a7b074f3a9a25 100644
--- a/el9/templates/mailrc-configmap.yaml
+++ b/el9/templates/mail-configmap.yaml
@@ -1,12 +1,12 @@
 kind: ConfigMap
 apiVersion: v1
 metadata:
-  name: mailrc-config-{{ .Release.Name }}
+  name: mail-config-{{ .Release.Name }}
 data:
   # configures mailx to send email via SMTP to cernmx.cern.ch
   # This allows CGI scripts to use the POSIX mailx command to send email.
   # PHP can also be configured to send email via mailx (see php.ini, sendmail_path).
-  mail.rc: |
+  s-nail.rc: |
     # This is the configuration file for Heirloom mailx (formerly
     # known under the name "nail". 
     # See mailx(1) for further options.