diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index 13ed5e05c6..f43d69afc1 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -88,4 +88,7 @@ sekuco.org
 shitac.tech
 stumail.sdut.edu.cn
 cougarmail.collin.edu
-cet.edu
\ No newline at end of file
+cet.edu
+myportal.taftcollege.edu
+students.noc.edu
+ncist.edu.cn
\ No newline at end of file