diff --git a/mail-worker/src/email/email.js b/mail-worker/src/email/email.js
index cff3962..26e6a90 100644
--- a/mail-worker/src/email/email.js
+++ b/mail-worker/src/email/email.js
@@ -199,7 +199,7 @@ function checkBlock(blackSubjectStr, blackContentStr, blackFromStr, email) {
 	}
 
 	for (const blackFrom of blackFromList) {
-		if (email.from.address.includes(blackFrom)) {
+		if (email.from.address === blackFrom || emailUtils.getDomain(email.from.address) === blackFrom) {
 			return true
 		}
 	}