diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index c7e3beb2ab..e7c9cdb1f2 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -56,6 +56,8 @@ mail.dream.edu.kg
 sierracollege.edu
 sss.edu.bi
 stu.shzu.edu.cn
+gavilan.edu
+cccd.edu
 mail.wcccd.edu
 ustb.edu.cn
-cumtb.edu.cn
+cumtb.edu.cn
\ No newline at end of file