diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index a8281a20e5..bcc4b3b2fd 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -47,4 +47,5 @@ mail.hrka.net
 abcda.tech
 t.odmail.cn
 ccc.edu
+nfs.edu.rs
 cqu.edu.cn