Adding sisfirst.com to high trust (#401)

aidenmitchell · web-flow · commit a03652e25c33 · 2025-04-30T09:03:39.000-07:00
diff --git a/high_trust_sender_root_domains.txt b/high_trust_sender_root_domains.txt
@@ -381,6 +381,7 @@ signnow.com
 signup.aws
 simplelegal.com
 simpletix.com
+sisfirst.com
 sktelecom.com
 slack.com
 slack-mail.com
