diff --git a/CHANGELOG b/CHANGELOG
index d0c6e34..f088e66 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,7 @@ Revision history for Lufi
 
 0.08.0 ????-??-??
 	- 🔧 — Rename ldap_user to auth_user for invitations (@mildis)
+	- 💥 — [BREAKING CHANGE] Mail sending is now disabled by default! Set disable_mail_sending to 0 to enable it
 
 0.07.0 2023-12-25
 	- ⬆️ — Update jQuery
diff --git a/lib/Lufi/DefaultConfig.pm b/lib/Lufi/DefaultConfig.pm
index e1ea0ac..6baf5bb 100644
--- a/lib/Lufi/DefaultConfig.pm
+++ b/lib/Lufi/DefaultConfig.pm
@@ -17,7 +17,7 @@ our $default_config = {
         how => 'sendmail'
     },
     mail_sender              => 'no-reply@lufi.io',
-    disable_mail_sending     => 0,
+    disable_mail_sending     => 1,
     theme                    => 'default',
     upload_dir               => 'files',
     session_duration         => 3600,
diff --git a/lufi.conf.template b/lufi.conf.template
index 044ec03..2a274b3 100644
--- a/lufi.conf.template
+++ b/lufi.conf.template
@@ -175,8 +175,9 @@
     #mail_sender => 'no-reply@lufi.io',
 
     # Disable sending mail through the server
-    # optional, default is false
-    #disable_mail_sending => 0,
+    # Recommended option as mail sending can be abused by spammers
+    # optional, default is true
+    #disable_mail_sending => 1,
 
     #############
     # DB settings
diff --git a/t/mysql.conf b/t/mysql.conf
index 3288b2d..dd1383a 100644
--- a/t/mysql.conf
+++ b/t/mysql.conf
@@ -164,6 +164,11 @@
     # optional, default to no-reply@lufi.io
     #mail_sender => 'no-reply@lufi.io',
 
+    # Disable sending mail through the server
+    # Recommended option as mail sending can be abused by spammers
+    # optional, default is true
+    #disable_mail_sending => 1,
+
     #############
     # DB settings
     #############
diff --git a/t/postgresql.conf b/t/postgresql.conf
index 87b3e3f..d81c70a 100644
--- a/t/postgresql.conf
+++ b/t/postgresql.conf
@@ -160,6 +160,11 @@
     # optional, default to no-reply@lufi.io
     #mail_sender => 'no-reply@lufi.io',
 
+    # Disable sending mail through the server
+    # Recommended option as mail sending can be abused by spammers
+    # optional, default is true
+    #disable_mail_sending => 1,
+
     #############
     # DB settings
     #############
diff --git a/t/sqlite.conf b/t/sqlite.conf
index 9d60d2b..47f8a1d 100644
--- a/t/sqlite.conf
+++ b/t/sqlite.conf
@@ -164,6 +164,11 @@
     # optional, default to no-reply@lufi.io
     #mail_sender => 'no-reply@lufi.io',
 
+    # Disable sending mail through the server
+    # Recommended option as mail sending can be abused by spammers
+    # optional, default is true
+    #disable_mail_sending => 1,
+
     #############
     # DB settings
     #############
diff --git a/t/test.t b/t/test.t
index 936132a..c8daec1 100644
--- a/t/test.t
+++ b/t/test.t
@@ -58,6 +58,7 @@ BEGIN {
                     how => 'sendmail'
                 },
                 mail_sender              => 'no-reply@lufi.io',
+                disable_mail_sending     => 1,
                 theme                    => 'default',
                 upload_dir               => 'files',
                 session_duration         => 3600,