Set /etc/mailname on all systems.

states/email-satellite/exim4/update-exim4.conf.conf

@@ -17,7 +17,7 @@
 # This is a Debian specific file
 
 dc_eximconfig_configtype='satellite'
-dc_other_hostnames=''
+dc_other_hostnames='hedwig.lunch.org.uk'
 dc_local_interfaces='127.0.0.1 ; ::1'
 dc_readhost=''
 dc_relay_domains=''
@@ -25,7 +25,7 @@ dc_minimaldns='false'
 dc_relay_nets=''
 dc_smarthost='scabbers.lunch.org.uk'
 CFILEMODE='644'
-dc_use_split_config='false'
-dc_hide_mailname=''
+dc_use_split_config='true'
+dc_hide_mailname='false'
 dc_mailname_in_oh='true'
 dc_localdelivery='mail_spool'

states/email-satellite/init.sls

@@ -31,3 +31,9 @@ email_aliases:
     - name: /etc
     - file_mode: '0644'
     - source: salt://email/aliases
+
+email_mailname:
+  file.managed:
+    - names:
+      - /etc/mailname:
+        - source: salt://email-satellite/mailname

states/email-satellite/mailname

@@ -0,0 +1 @@
+hedwig.lunch.org.uk

states/email/exim4.sls

@@ -53,3 +53,15 @@ exim4_service:
     - reload: true
     - watch:
       - cmd: exim4_update_conf
+
+email_aliases:
+  file.recurse:
+    - name: /etc
+    - file_mode: '0644'
+    - source: salt://email/aliases
+
+email_mailname:
+  file.managed:
+    - names:
+      - /etc/mailname:
+        - source: salt://email/mailname

states/email/mailboxes.sls

@@ -49,10 +49,3 @@ cryhavocbag:
     - shell: /usr/sbin/nologin
     - uid: 1008
     - gid: 1008
-
-email_aliases:
-  file.recurse:
-    - name: /etc
-    - file_mode: '0644'
-    - source: salt://email/aliases
-

states/email/mailname

@@ -0,0 +1 @@
+lunch.org.uk