diff --git a/conf/diaspora.yml b/conf/diaspora.yml
index 67638b4..5628c58 100644
--- a/conf/diaspora.yml
+++ b/conf/diaspora.yml
@@ -552,14 +552,14 @@ configuration: ## Section
   mail: ## Section
 
     ## First you need to enable it.
-    #enable: true
+    enable: true
 
     ## Sender address used in mail sent by Diaspora.
-    #sender_address: 'no-reply@example.org'
+    sender_address: 'no-reply@{{ domain }}'
 
     ## This selects which mailer should be used. Use 'smtp' for a smtp
     ## connection or 'sendmail' to use the sendmail binary.
-    #method: 'smtp'
+    method: 'sendmail'
 
     ## Ignore if method isn't 'smtp'.
     smtp: ## Section
@@ -596,7 +596,7 @@ configuration: ## Section
     sendmail: ## Section
 
       ## The path to the sendmail binary (default='/usr/sbin/sendmail')
-      #location: '/usr/sbin/sendmail'
+      location: '/usr/sbin/sendmail'
 
       ## Use exim and sendmail (default=false)
       #exim_fix: false
@@ -608,11 +608,10 @@ configuration: ## Section
     ## This doesn't make the user an admin but is used when a generic
     ## admin contact is needed, much like the postmaster role in mail
     ## systems. Set only the username, NOT the full ID.
-    #account: "podmaster"
+    account: "{{ admin }}"
 
     ## E-mail address to contact the administrator.
-    # TODO
-    #podmin_email: 'podmin@example.org'
+    podmin_email: '{{ admin_email }}'
 
   ## Settings related to relays
   # TODO
diff --git a/manifest.json b/manifest.json
index a74b947..8d664fe 100644
--- a/manifest.json
+++ b/manifest.json
@@ -51,6 +51,15 @@
              "fr": "Est-ce un site public ?"
            },
            "default": true
+         },
+         {
+           "name": "admin",
+           "type": "user",
+           "ask": {
+             "en": "Choose the diaspora* administrator (must be an existing YunoHost user)",
+             "fr": "Choisissez l'administrateur de diaspora* (doit être un utilisateur YunoHost)"
+           },
+           "example": "johndoe"
          }
        ]
      }
diff --git a/scripts/install b/scripts/install
index dd75ce0..df83ab3 100755
--- a/scripts/install
+++ b/scripts/install
@@ -31,6 +31,8 @@ ynh_abort_if_errors
 domain=$YNH_APP_ARG_DOMAIN
 path_url=$YNH_APP_ARG_PATH
 is_public=$YNH_APP_ARG_IS_PUBLIC
+admin=$YNH_APP_ARG_ADMIN
+admin_email=$(ynh_user_get_info --username=$admin --key=mail)
 
 
 # This is a multi-instance app, meaning it can be installed several times independently
@@ -128,6 +130,7 @@ export domain
 export path_url
 export db_pass
 export final_path
+export admin
 
 #=================================================
 # CONFIGURE DIASPORA