diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index a4db43ed74..cdc7156b67 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -6,4 +6,6 @@ australia.edu
 alumni.nottingham.ac.uk
 alumni.cmu.edu
 int.edu.gr
+sbu.ac.ir
+mail.sbu.ac.ir
 maricopa.edu