diff --git a/src/main/java/com/loafle/overflow/central/module/email/service/EmailAuthService.java b/src/main/java/com/loafle/overflow/central/module/email/service/EmailAuthService.java
index 2b300ef..91c7578 100644
--- a/src/main/java/com/loafle/overflow/central/module/email/service/EmailAuthService.java
+++ b/src/main/java/com/loafle/overflow/central/module/email/service/EmailAuthService.java
@@ -68,7 +68,9 @@ public class EmailAuthService {
             boolean res = this.isValidateTime(auth);
 
             if (!res) {
-                throw new OverflowException("The authentication expiration time has passed.", new Throwable());
+                throw new OverflowException(
+                        "The authentication expiration time has expired, or the token has been verified.",
+                        new Throwable());
             }
 
             auth.setAuthConfirmDate(new Date());
@@ -97,7 +99,9 @@ public class EmailAuthService {
             boolean res = this.isValidateTime(auth);
 
             if (!res) {
-                throw new OverflowException("The authentication expiration time has passed.", new Throwable());
+                throw new OverflowException(
+                        "The authentication expiration time has expired, or the token has been verified.",
+                        new Throwable());
             }
 
             auth.setAuthConfirmDate(new Date());
@@ -154,6 +158,10 @@ public class EmailAuthService {
             return false;
         }
 
+        if (null != auth.getAuthConfirmDate()) {
+            return false;
+        }
+
         return true;
     }