diff --git a/helm/mail/values.yaml b/helm/mail/values.yaml
index a8608ea..2efa6a9 100644
--- a/helm/mail/values.yaml
+++ b/helm/mail/values.yaml
@@ -52,6 +52,7 @@ metrics:
     enabled: true
     logrotate.conf: |
       /var/log/mail.log {
+          copytruncate
           rotate 1
           monthly
           minsize 1M