diff --git a/canaille/conf/config.sample.toml b/canaille/conf/config.sample.toml
index d12aa3bc..f1e1ad3e 100644
--- a/canaille/conf/config.sample.toml
+++ b/canaille/conf/config.sample.toml
@@ -144,10 +144,12 @@ LOCALE = "preferredLanguage"
 PICTURE = "jpegPhoto"
 ADDRESS = "postalAddress"
 
-[SMTP]
-HOST = "localhost"
-PORT = 25
-TLS = false
-LOGIN = ""
-PASSWORD = ""
-FROM_ADDR = "admin@mydomain.tld"
+# The SMTP server options. If not set, mail related features such as
+# user invitations, and password reset emails, will be disabled.
+# [SMTP]
+# HOST = "localhost"
+# PORT = 25
+# TLS = false
+# LOGIN = ""
+# PASSWORD = ""
+# FROM_ADDR = "admin@mydomain.tld"
diff --git a/demo/conf/canaille.toml b/demo/conf/canaille.toml
index 2c2b6fee..6a4eff39 100644
--- a/demo/conf/canaille.toml
+++ b/demo/conf/canaille.toml
@@ -151,6 +151,8 @@ LOCALE = "preferredLanguage"
 PICTURE = "photo"
 ADDRESS = "postalAddress"
 
+# The SMTP server options. If not set, mail related features such as
+# user invitations, and password reset emails, will be disabled.
 [SMTP]
 HOST = "localhost"
 PORT = 25