diff --git a/HowtoDovecot.md b/HowtoDovecot.md
index 406f4bf3..b50bfa8d 100644
--- a/HowtoDovecot.md
+++ b/HowtoDovecot.md
@@ -968,3 +968,23 @@ ou
 # doveadm force-resync -u plhotetemp /home/<USER>/Maildir/
 ~~~
 
+### Warning: service(imap-login): process_limit (100) reached, client connections are being dropped
+
+Si besoin, on augmente les limites, par exemple :
+
+~~~
+service login {
+    process_limit = 512
+}
+service imap {
+    process_limit = 512
+}
+service imap-login {
+  process_limit = 512
+  service_count = 0
+}
+service imap {
+  process_limit = 1024
+}
+~~~
+