Title: Multi-Email Login
Author: mdburnette
Published: <strong>2026 年 1 月 5 日</strong>
Last modified: 2026 年 1 月 5 日

---

搜尋外掛

![](https://ps.w.org/multi-email-login/assets/banner-772x250.png?rev=3433085)

![](https://ps.w.org/multi-email-login/assets/icon-256x256.png?rev=3433082)

# Multi-Email Login

 由 [mdburnette](https://profiles.wordpress.org/mdburnette/) 開發

[下載](https://downloads.wordpress.org/plugin/multi-email-login.1.0.2.zip)

 * [詳細資料](https://tw.wordpress.org/plugins/multi-email-login/#description)
 * [使用者評論](https://tw.wordpress.org/plugins/multi-email-login/#reviews)
 *  [安裝方式](https://tw.wordpress.org/plugins/multi-email-login/#installation)
 * [開發資訊](https://tw.wordpress.org/plugins/multi-email-login/#developers)

 [技術支援](https://wordpress.org/support/plugin/multi-email-login/)

## 外掛說明

Multi-Email Login is a WordPress plugin that enables users to associate multiple
email addresses with a single account and authenticate using any of them. This solves
a common problem where users have multiple email addresses (personal, work, legacy
accounts) but want to maintain a single WordPress profile.

**Why Use Multi-Email Login?**

 * **Flexibility**: Users can login with whichever email address they have handy
 * **Account Consolidation**: No need to create separate accounts for different 
   email addresses
 * **Smooth Transitions**: When changing primary email addresses, users can keep
   both active for seamless access
 * **Business Use**: Perfect for team members who use multiple email addresses across
   different departments or clients
 * **Zero Friction**: Works transparently with WordPress authentication—no special
   configuration needed

**Features:**
 * Multiple email addresses per user (unlimited) * Login with any 
associated email address * Seamless WordPress authentication integration * Unique
email enforcement * User-friendly interface * No configuration needed * No WordPress
core modifications * Developer-friendly API for finding users by any email address

**Security:**
 * Email format validation * Input sanitization * AJAX nonce protection*
User capability checks * Password verification * Duplicate prevention

### Developer Usage

The plugin provides a simple API for developers to work with multiple email addresses:

**Find a user by any email address (primary or secondary):**
 $user = melog_get_user_by(’
email’, ‘user@example.com’ );

This function works just like WordPress’s `get_user_by()` but automatically checks
both primary and secondary email addresses.

**Instead of:**
 $user = get_user_by( ’email’, ‘user@example.com’ );

**Use:**
 $user = melog_get_user_by( ’email’, ‘user@example.com’ );

For other field types (login, ID, slug), it behaves identically to the standard 
WordPress function.

## 安裝方式

 1. Upload the `multi-email-login` folder to `/wp-content/plugins/`
 2. Activate the plugin from the WordPress Plugins menu
 3. Go to Users  Your Profile and add secondary emails
 4. Login with any associated email address

## 常見問題集

### Can I login with any of my associated emails?

Yes! Once you add an email address to your account, you can use it to login just
like your primary email.

### Is there a limit to how many emails I can add?

No, you can add as many email addresses as you need to your account.

### Are my emails secure?

Yes, all emails are validated and stored securely. AJAX requests are protected with
nonces and user capabilities are verified.

### Will this work with multisite?

Yes, the plugin is fully compatible with WordPress multisite installations.

### Can developers use this in their code?

Yes! Developers can use the `melog_get_user_by()` function as a drop-in replacement
for WordPress’s `get_user_by()`. It automatically checks both primary and secondary
email addresses when looking up users by email.

## 使用者評論

這個外掛目前沒有任何使用者評論。

## 參與者及開發者

以下人員參與了開源軟體〈Multi-Email Login〉的開發相關工作。

參與者

 *   [ mdburnette ](https://profiles.wordpress.org/mdburnette/)

[將〈Multi-Email Login〉外掛本地化為台灣繁體中文版](https://translate.wordpress.org/projects/wp-plugins/multi-email-login)

### 對開發相關資訊感興趣？

任何人均可[瀏覽程式碼](https://plugins.trac.wordpress.org/browser/multi-email-login/)、
查看 [SVN 存放庫](https://plugins.svn.wordpress.org/multi-email-login/)，或透過 
[RSS](https://plugins.trac.wordpress.org/log/multi-email-login/?limit=100&mode=stop_on_copy&format=rss)
訂閱[開發記錄](https://plugins.trac.wordpress.org/log/multi-email-login/)。

## 變更記錄

#### 1.0.2

 * Added `melog_get_user_by()` function for developers

#### 1.0.1

 * Fixed WordPress security standards compliance
 * Improved code documentation
 * Enhanced error handling

#### 1.0.0

 * Initial release

## 中繼資料

 *  版本 **1.0.2**
 *  最後更新 **7 個月前**
 *  啟用安裝數 **少於 10 次**
 *  WordPress 版本需求 ** 5.0 或更新版本 **
 *  已測試相容的 WordPress 版本 **6.9.5**
 *  PHP 版本需求 ** 7.2 或更新版本 **
 *  語言
 * [English (US)](https://wordpress.org/plugins/multi-email-login/)
 * 標籤:
 * [authentication](https://tw.wordpress.org/plugins/tags/authentication/)[email](https://tw.wordpress.org/plugins/tags/email/)
   [login](https://tw.wordpress.org/plugins/tags/login/)[multiple emails](https://tw.wordpress.org/plugins/tags/multiple-emails/)
   [user management](https://tw.wordpress.org/plugins/tags/user-management/)
 *  [進階檢視](https://tw.wordpress.org/plugins/multi-email-login/advanced/)

## 評分

這個項目尚無任何評論記錄。

[Your review](https://wordpress.org/support/plugin/multi-email-login/reviews/#new-post)

[查看全部使用者評論](https://wordpress.org/support/plugin/multi-email-login/reviews/)

## 參與者

 *   [ mdburnette ](https://profiles.wordpress.org/mdburnette/)

## 技術支援

使用者可在技術支援論壇提出意見反應或使用問題。

 [檢視技術支援論壇](https://wordpress.org/support/plugin/multi-email-login/)