diff --git a/HowtoDovecot.md b/HowtoDovecot.md
index 00f826fa..26c0484e 100644
--- a/HowtoDovecot.md
+++ b/HowtoDovecot.md
@@ -474,7 +474,14 @@ dovecot: imap-login: Maximum number of connections from user+IP exceeded (mail_m
 
 ### Nagios
 
-TODO
+On utilise les checks classiques pour POP(S)/IMAP(S) :
+
+~~~
+/usr/lib/nagios/plugins/check_imap -H localhost
+/usr/lib/nagios/plugins/check_imap -S -H localhost -p 993
+/usr/lib/nagios/plugins/check_pop -H localhost
+/usr/lib/nagios/plugins/check_pop -S -H localhost -p 995
+~~~
 
 ### Munin