优化智能DNS相关代码

internal/utils/email.go

@@ -0,0 +1,12 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package utils
+
+import "regexp"
+
+var emailReg = regexp.MustCompile(`(?i)^[a-z\d]+([._+-]*[a-z\d]+)*@([a-z\d]+[a-z\d-]*[a-z\d]+\.)+[a-z\d]+$`)
+
+// ValidateEmail 校验电子邮箱格式
+func ValidateEmail(email string) bool {
+	return emailReg.MatchString(email)
+}