diff --git a/packages/zenn-markdown-html/__tests__/custom-syntax/embed/card.test.ts b/packages/zenn-markdown-html/__tests__/custom-syntax/embed/card.test.ts
index 3c843ad9..ccf597b5 100644
--- a/packages/zenn-markdown-html/__tests__/custom-syntax/embed/card.test.ts
+++ b/packages/zenn-markdown-html/__tests__/custom-syntax/embed/card.test.ts
@@ -28,6 +28,14 @@ describe('LinkCard埋め込み要素のテスト', () => {
         expect(html).toContain('URLが不正です');
       });
     });
+
+    describe('メールアドレス', () => {
+      test('メールアドレスのまま出力する', () => {
+        const html = markdownToHtml(`ec2-user@33.80.180.159`);
+        expect(html).toContain('ec2-user@33.80.180.159');
+        expect(html).not.toContain('URLが不正です');
+      });
+    });
   });
 
   describe('embedOriginを設定している場合', () => {
diff --git a/packages/zenn-markdown-html/src/index.ts b/packages/zenn-markdown-html/src/index.ts
index 7dcbfb8c..a7ab5ddb 100644
--- a/packages/zenn-markdown-html/src/index.ts
+++ b/packages/zenn-markdown-html/src/index.ts
@@ -38,6 +38,7 @@ const markdownToHtml = (text: string, options?: MarkdownOptions): string => {
   const md = markdownIt({ breaks: true, linkify: true });
 
   md.linkify.set({ fuzzyLink: false });
+  md.linkify.set({ fuzzyEmail: false }); // refs: https://github.com/markdown-it/linkify-it
 
   md.use(mdBr)
     .use(mdKatex)