diff --git a/pages/common/msmtp.md b/pages/common/msmtp.md
index 4680fd78b3..0231c42db9 100644
--- a/pages/common/msmtp.md
+++ b/pages/common/msmtp.md
@@ -2,6 +2,7 @@
 
 > An SMTP client.
 > It reads text from standard input and sends it to an SMTP server.
+> More information: <https://marlam.de/msmtp>.
 
 - Send an email using the default account configured in `~/.msmtprc`: