diff --git a/lib/domains/stoplist.txt b/lib/domains/stoplist.txt
index f545da12ef..31b7c0d1fb 100644
--- a/lib/domains/stoplist.txt
+++ b/lib/domains/stoplist.txt
@@ -424,4 +424,5 @@ social.helwan.edu.eg
 alumni.uci.edu
 cau.ac.kr
 univ-dbkm.dz
-mail.rmutt.ac.th
\ No newline at end of file
+mail.rmutt.ac.th
+lsts.edu.vn
\ No newline at end of file