diff --git a/i18n-tool.js b/i18n-tool.js
index f9625b6..d7cf9f6 100644
--- a/i18n-tool.js
+++ b/i18n-tool.js
@@ -19,8 +19,23 @@ module.exports = {
     }
   },
 
+  /*
+    - https://regex101.com/r/3uvtNl/1 
+      /^((?:[A-Za-z0-9!#$%&'*+\-\/=?^_`{|}~]|(?<=^|\.)"|"(?=$|\.|@)|(?<=".*)[ .](?=.*")|(?<!\.)\.){1,64})(@)((?:[A-Za-z0-9.\-])*(?:[A-Za-z0-9])\.(?:[A-Za-z0-9]){2,})$/
+    - https://emailregex.com/ 
+      /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
+  */
   validate_email ({ email, format } = {}) {
-    if (format) return new RegExp(format).test(email)
-    return /^.+@[^\.]+\..+$/.test(email)
+    let regex =
+      /^((?:[A-Za-z0-9!#$%&'*+\-\/=?^_`{|}~]|(?<=^|\.)"|"(?=$|\.|@)|(?<=".*)[ .](?=.*")|(?<!\.)\.){1,64})(@)((?:[A-Za-z0-9.\-])*(?:[A-Za-z0-9])\.(?:[A-Za-z0-9]){2,})$/
+    try {
+      if (typeof format === 'string') {
+        regex = new RegExp(format)
+      }
+    } catch (exp) {
+      console.log('Invalid email format: ', format)
+    }
+
+    return regex.test(email)
   },
 }