diff --git a/model/src/main/java/cn/org/gitlink/notification/model/dao/entity/vo/NewEmailJobParamsVo.java b/model/src/main/java/cn/org/gitlink/notification/model/dao/entity/vo/NewEmailJobParamsVo.java
index 94409b5..35fb3a2 100644
--- a/model/src/main/java/cn/org/gitlink/notification/model/dao/entity/vo/NewEmailJobParamsVo.java
+++ b/model/src/main/java/cn/org/gitlink/notification/model/dao/entity/vo/NewEmailJobParamsVo.java
@@ -22,7 +22,7 @@ public class NewEmailJobParamsVo {
 
     @ApiModelProperty(value = "邮件主题", required = true)
     @NotBlank(message = "邮件主题不能为空")
-    @Size(max = 500, message = "邮件主题长度在0~500")
+    @Size(max = 255, message = "邮件主题长度在0~255")
     private String subject;
 
     @ApiModelProperty(value = "邮件内容", required = true)