diff --git a/docs.it4i/storage/cesnet-s3.md b/docs.it4i/storage/cesnet-s3.md
index e6de8b12e934cf606589342ab13f83e58da82448..438333a1a61eed5de03237c63f2ed18ee387896f 100644
--- a/docs.it4i/storage/cesnet-s3.md
+++ b/docs.it4i/storage/cesnet-s3.md
@@ -1,6 +1,6 @@
 # CESNET S3 Storage
 
-S3 service is a general service suited for most of the use cases. S3 service can be used for elementary data storing, automated backups, or various types of data handling applications.
+S3 service is a general service suited for most of the use cases. S3 service can be used for elementary data storing, automated backups, or various types of data handling applications. The service is supported by CESNET Storage Department: [e-mail du-support(at)cesnet.cz][email]
 
 For more information, see [e-IINFRA CZ S3 Service documentation][a].
 
@@ -50,3 +50,5 @@ IT4I offers two tools for object storage management on Karolina:
 [c]: https://du.cesnet.cz/cs/navody/object_storage/cesnet_s3/start
 [d]: https://www.s3express.com/kb/item26.htm
 [e]: https://filesender.cesnet.cz/
+
+[email]: mailto: du-support@cesnet.cz