diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index dcf02a2404..0302a958e4 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -103,4 +103,5 @@ bbc.edu.cn
 student.cccs.edu
 fountaingatesc.vic.edu.au
 edu.tanta.edu.eg
-std.uestc.edu.cn
\ No newline at end of file
+std.uestc.edu.cn
+mail.ltcc.edu 
\ No newline at end of file