WP Mail SMTP by WPForms


WordPress 电子邮件 SMTP 寄件插件

Having problems with your WordPress site not sending emails? You’re not alone. Over 1 million websites use WP Mail SMTP to send their emails reliably.

Our goal is to make email deliverability easy and reliable. We want to ensure your emails reach the inbox.

WP Mail SMTP fixes your email deliverability by reconfiguring WordPress to use a proper SMTP provider when sending emails.


SMTP (Simple Mail Transfer Protocol) is an industry standard for sending emails. Proper SMTP configuration helps increase email deliverability by using authentication.

Popular email clients like Gmail, Yahoo, and Office 365 are in a constant battle with email spammers. One of the things they look at is if an email is originating from the location it claims to be originating from.

If the proper authentication isn’t there, then emails either go in the SPAM folder or worst, don’t get delivered at all.




WP Mail SMTP如何工作?

WP Mail SMTP plugin easily resolves email delivery problems by improving and changing how your WordPress site sends email. We reconfigure the wp_mail() function to either use proper SMTP host credentials or leverage a built-in SMTP mail provider.

When using one of our built-in SMTP mail provider integrations (recommended), emails are sent using the provider’s direct API. This means even if your web host is blocking SMTP ports, your emails still send successfully.

谷歌翻译:WP Mail SMTP插件包括四种不同的SMTP设置选项:

WP Mail SMTP插件包含许多不同的SMTP设置选项:

  1. SMTP.com (Recommended)
  2. Pepipost SMTP (Recommended)
  3. Sendinblue SMTP
  4. Mailgun SMTP
  5. SendGrid SMTP
  6. Gmail SMTP
  7. Microsoft SMTP (Outlook.com and Office 365) [Pro]
  8. Amazon SES SMTP [Pro]
  9. 所有其他SMTP


谷歌翻译:我们决定将其全部集于一身,而不是让用户为不同的SMTP提供商使用不同的SMTP插件和工作流程。 这就是使WP Mail SMTP成为WordPress的最佳SMTP解决方案的原因。


SMTP.com is a recommended transactional email service.

With over 22 years of email delivery expertise, SMTP.com has been around for almost as long as email itself. They are known among internet providers as one of the most reliable senders on the internet.

Their easy integration process lets you start sending emails in minutes and benefit from years of experience. SMTP.com provides users 50,000 free emails the first 30 days.

Read our SMTP.com documentation for more details.

Pepipost SMTP

Pepipost is a recommended transactional email service.

Every month they delivers over 8 billion emails from 20,000+ customers.

Their mission is to reliably send emails in the most efficient way and at the most disruptive pricing ever.
Pepipost provides users 30,000 emails the first 30 days.

Read our Pepipost documentation for more details.

Sendinblue SMTP

They serve 80,000+ growing companies around the world and send over 30 million emails each day.

Their email deliverability experts are constantly at work optimizing the reliability and speed of their SMTP infrastructure. Sendinblue provides users 300 free emails per day.

Read our Sendinblue documentation for more details.

Mailgun SMTP

Mailgun SMTP is a popular SMTP service provider that allows you to send large quantities of emails. They provide 5,000 free emails per month for 3 months.

谷歌翻译:WP Mail SMTP插件提供与MailGun的本机集成。 您所要做的就是连接您的Mailgun帐户,您将提高您的电子邮件传送能力。

Read our Mailgun documentation for more details.

SendGrid SMTP

谷歌翻译:SendGrid有一个免费的SMTP计划,您可以使用它每天发送多达100封电子邮件。 通过我们的本机SendGrid SMTP集成,您可以在WordPress站点上轻松安全地设置SendGrid SMTP。

Read our SendGrid documentation for more details.

Gmail SMTP

谷歌翻译:博主和小企业主通常不想使用第三方SMTP服务。 那么您可以使用Gmail或G Suite帐户来收发SMTP电子邮件。


谷歌翻译:与其他Gmail SMTP插件不同,我们的Gmail SMTP选项使用OAuth对您的Google帐户进行身份验证,确保您的登录信息100%安全。

Read our Gmail documentation for more details.

Microsoft SMTP (Outlook.com and Office 365)

Many business use Outlook.com or Office 365 to their to power their email. For those users, the Microsoft mailer can be a great option. This integration allows you to use your existing Outlook.com or Office 365 account to send your emails reliably.


Advanced or technical users can harness the power of Amazon AWS (Amazon Web Services) with the Amazon SES mailer. With this integration, you can send a high volume of emails at a very reasonable rate.

Read our Amazon SES documentation for more details.


WP Mail SMTP插件可以用于常见的电子邮件服务如Gmail、Yahoo、Outlook、Microsoft Live,也可用于其他提供SMTP的电子邮件服务。


  • 指定一个SMTP主机。
  • 指定一个SMTP端口。
  • 选择SSL / TLS加密。
  • 是否选择使用SMTP身份验证。
  • 指定SMTP用户名和密码。


我们希望您发现WP Mail SMTP插件有用!


In addition to native Microsoft and Amazon SES integrations, WP Mail SMTP Pro provides access to many other powerful features and services.

Click here to purchase WP Mail SMTP Pro now!

Email Log

Email Logging lets you log and view all emails sent from your site. Email logs are helpful for storing emails for your records, auditing outgoing emails, and debugging during site development.

Manage WordPress Emails and Notifications

The Manage Notification feature gives you full control over which email notifications WordPress sends. This means you can disable different WordPress notification emails. Don’t want to receive emails when new users are created? No problem, turn it off.

Expert Support

We provide limited support for the WP Mail SMTP plugin on the WordPress.org forums. Access to our world class one-on-one email support is available to WP Mail SMTP Pro users.

White Glove Setup

Our White Glove Setup service is a great option that anyone can benefit from. Whether you don’t have the time or maybe you feel a bit in over your head – we’ve got you covered.

You can sit back and relax while we set up everything for you. White glove setup includes WP Mail SMTP plugin installation and setup, configuration adjustments to your DNS for proper email domain name verification, Mailgun setup, and final testing to confirm everything is passing with flying colors.


The WP Mail SMTP team takes security very seriously. Not only does the plugin follow all security best practices, but we have several options available to ensure your site is safe and secure.

  • Direct SMTP mailer integrations (recommended), such as SMTP.com, Pepipost and Mailgun, use the official provider APIs. This means you never enter your username or password in the plugin settings and these credentials are not stored in the database. Instead, we use tokens or API keys which are much more secure.

  • When using Other SMTP mailer, we provide the option to insert your password in your wp-config.php file, so it’s not visible in your WordPress settings or saved in the database.


WP Mail SMTP插件最初是由Callum Macdonald所开发。 现由WPForms幕后的团队所拥有和维护,WPForms是很受欢迎的WordPress拖放表单生成器。




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Visit WPBeginner to learn from our WordPress Tutorials and find out about other best WordPress plugins.


  • WP Mail SMTP 设置页面
  • Gmail/G Suite 设置
  • Mailgun 设置
  • SendGrid 设置
  • SMTP 设置
  • 发送测试邮件


  1. 通过WordPress.org的插件仓库或上传文件到您的服务器来安装WP Mail SMTP。 (可阅读以下说明如何安装WordPress插件)
  2. 激活 WP Mail SMTP by WPForms。
  3. 在WordPress仪表盘中,转到WP Mail SMTP的设置页面。
  4. 谷歌翻译:选择您的SMTP选项(Mailgun SMTP,SendGrid SMTP,Gmail SMTP或其他SMTP),然后按照说明进行设置。
  5. Need more help? Get support with WP Mail SMTP PRO.


我可以使用此插件去发送Gmail,G Suite,Outlook.com,Office 365,Hotmail,Yahoo或AOL SMTP的电子邮件吗?

是的! 我们有大量涵盖了设置SMTP最流行的电子邮件服务的文档。

Read our docs to see the correct SMTP settings for each service.

救命! 我需要支持/我有一个问题。


Limited support is available for WP Mail SMTP users via WordPress.org support forums.

Email support and set up assistance is available to WP Mail SMTP Pro users.


谷歌翻译:如果您偶然发现了一个错误,最好的报告位置是 WP Mail SMTP GitHub存储库。 GitHub是插件积极开发的地方,在那里发布将让我们的开发人员(我和Slava)很快看到你的问题。 发布后,我们将审核您的错误报告并对错误进行分类。 创建问题时,可以添加到报表中的详细信息越多,解决错误的速度就越快。

Can you add feature x, y or z to the plugin?

Short answer: maybe.

请务必与我们联系以讨论您希望在插件中添加哪些功能或选项。 我们不保证全部的功能都添加,但我们会考虑所有合理的要求。 可在此处联系我们。



That's all you ever want from a wordpress app. Something that works well, and always works. This one does both. Easy to set up, and pretty much faultless
I've used this across multiple sites and have never had a problem with the plugin (sometimes clients' email account info isn't correct but that's a different issue). I've used the Gmail and SMTP functionality and it works consistently with both. Grateful to have this plugin in my toolbox and for the work the creator has put into building and maintaining it!

Contributors & Developers

“WP Mail SMTP by WPForms” 是开源软件。 以下人员对此插件做出了贡献。


“WP Mail SMTP by WPForms” 已翻译成26 语言环境。 感谢译者的贡献。

将“WP Mail SMTP by WPForms”翻译成您的语言。

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.


2.2.1 – 2020-07-09

  • Added: Gmail mailer now supports aliases.
  • Added: Support both old PHPMailer v5 (WordPress <=5.4) and PHPMailer v6 (WordPress >=5.5).
  • Changed: Pepipost mailer is now using the native API v5 instead of the SendGrid migration API.
  • Fixed: Incorrect Mailgun Domain Name option was not showing an email delivery error.
  • Fixed: Empty debug errors for the Sendinblue mailer are no more.
  • Fixed: Properly compare From Email option value with a correct default email address from WP core.

2.1.1 – 2020-06-08

  • Changed: Remove current automatic default reply-to address and add WP filter wp_mail_smtp_processor_set_default_reply_to for setting default reply-to addresses.
  • Changed: Improve description for several options with links to an article about how to properly use constants.
  • Fixed: PHP parse error connected to Monolog library on PHP versions < 7.x.

2.1.0 – 2020-06-04

  • Added: Async/scheduled tasks management support.
  • Added: New warning notification for selecting the “Default (none)” mailer and saving the plugin settings.
  • Changed: Set the original From Email as Reply-To address if it was overwritten by the Force From Email option.
  • Changed: The Force From Email option is now enabled by default, for new plugin installs.
  • Changed: Reply-To header is now set when not provided, equals to From Name/Email.
  • Fixed: Display a non-empty PHPMailer error when some non-SMTP mailers generate errors.
  • Fixed: Display a more accurate message, when the “channel – not found” error is triggered by SMTP.com API.
  • Fixed: Save and display debug errors for the “Other SMTP” mailer.
  • Fixed: Improve the debug details for the “Invalid address (setFrom)” error in the Email Test tab.
  • Fixed: Improve the debug details for SMTP CA verification fail, Gmail Guzzle requirements, and Gmail invalid grant errors.
  • Fixed: Improve the uninstall cleanup procedure.

2.0.1 – 2020-05-07

  • Changed: Improved description of the “Do Not Send” plugin option.
  • Fixed: Due to Pepipost API changes we now convert new lines so they are preserved in plain text emails.
  • Fixed: Downgrade internal Guzzle dependency to 6.4 to temporarily fix compatibility issues with WordPress and Guzzle 6.5. Affects Gmail mailer.

2.0.0 – 2020-04-27

  • IMPORTANT: Support for PHP 5.2-5.4 has been discontinued. If you are running one of those versions, you MUST upgrade PHP before installing or upgrading to WP Mail SMTP v2.0. Failure to do that will disable WP Mail SMTP functionality.
  • Added: new mailer – SMTP.com integration.
  • Changed: Plugin filters that change the FROM Name/Email in emails are now always running last.
  • Fixed: false value of the WPMS_SMTP_AUTH/WPMS_SMTP_AUTOTLS constants was not properly handled in UI.
  • Fixed: various minor code and internal links improvements.

1.9.0 – 2020-03-23

  • Added: Add various Status tests and Info section on Tools > Site Health page.
  • Added: Notify admin if there are unsaved changes in plugin admin area options.
  • Fixed: Test email now has a proper bottom margin for better look.
  • Changed: Update “About us” plugin page with relevant information.
  • Changed: Save default WordPress FROM Email address when incorrect FROM Email address is saved by a user.

1.8.1 – 2019-12-13

  • Fixed: Revert Guzzle version to 6.4.1 because Sendinblue and Gmail mailers may experience issues under certain circumstances while sending emails (not all sites are affected).
  • Fixed: Make compatible the WordPress PhpMailer class inline attachments management with the Sendgrid API.

1.8.0 – 2019-12-12

  • Added: New recommended mailer: Pepipost.
  • Added: “Suggest a Mailer” link in a list of mailers to send us your ideas about new ones.
  • Fixed: Sendgrid: Content ID for attachments missing.
  • Changed: Timeout to HTTP requests (pepipost, sendgrid, mailgun), same as max_execution_time, to prevent fails when sending emails with big attachments.

1.7.1 – 2019-11-11

  • Fixed: Compatibility with WordPress 5.3.
  • Fixed: Processor::get_default_email() always returns empty value when server incorrectly configured.

1.7.0 – 2019-10-24

  • Added: Add a new constant WPMS_DO_NOT_SEND to block email sending.
  • Fixed: Default email (wordpress@example.com) rewriting in CLI mode.
  • Fixed: Incorrect conflicts detection with certain plugins.
  • Fixed: various typos in plugin settings.

1.6.2 – 2019-09-02

  • Fixed: Race condition when loading with certain plugins, that send emails very early. Makes email delivery more reliable.

1.6.0 – 2019-08-21

  • Added: New transactional mailer: Sendinblue.
  • Added: Educate users to use transactional mailers for better deliverability.
  • Added: New option and filter to disable admin area delivery error notices.
  • Changed: Hide private API key saved in the DB for API based mailers using input[type=password].
  • Changed: Update links to various docs, pointing now to https://wpmailsmtp.com.

1.5.2 – 2019-07-18

  • Fixed: “Redirect URI mismatch” error for “Gmail” mailer when trying to re-authorize an account that was initially created with version < v1.5.0.
  • Changed: Make “Authentication” setting in “Other SMTP” mailer ON by default for new users.
  • Changed: Mailers docs links now point to wpmailsmtp.com own site.

1.5.1 – 2019-07-12

  • Fixed: Duplicated emails sent to the first recipient in a loop (and others not receiving their emails).

1.5.0 – 2019-07-09

  • Added: Loсo plugin support.
  • Added: “About us” admin area page.
  • Added: Display in debug output a possible conflicting plugin existence.
  • Added: Lots of actions and filters to improve flexibility of the plugin.
  • Changed: Plugin menu is now top level.
  • Changed: Hide secrets/API keys in page DOM in plugin admin area.
  • Changed: Do not save constant values into the database when plugin settings are saved.
  • Changed: Lots of i18n improvements to support translation for both free and paid version of the plugin.
  • Changed: Gmail mailer – allow to change From Name email header.
  • Changed: Gmail mailer – display email used to create a connection.
  • Changed: WordPress 4.9 is the minimum WordPress version we support.
  • Fixed: X-Mailer header should be present in all emails.
  • Fixed: PHP notices when migrating under certain circumstances from 0.x version of the plugin.
  • Fixed: Options::get_group() now supports values set via constants.

1.4.2 – 2019-03-23

  • 变化:已测试到WordPress 5.1.x.
  • 变化:删除了TGMPA库。

1.4.1 – 2018-12-03

  • 修复:正确处理通过常量定义的SMTP密码中的反斜杠。
  • 变化:允许在插件设置中选择默认(无)邮件程序时发送测试电子邮件。

1.4.0 – 2018-11-29

  • Added: New option: Do Not Send – block emails from being sent.
  • Added: New option: Send HTML or plain text emails when doing an Email Test.
  • Added: New option: Mailgun region selection – US and EU (US is default to preserve compatibility).
  • 修复:兼容WordPress 3.6+。
  • 修复:兼容WordPress 5.0。
  • 修复。 常量现可在多站点网络中使用。 设置后,常量会在整个网络的站点中全局保持生效。
  • Fixed: Preserve multipart emails when using Sendgrid/Mailgun mailers (were converted to HTML-only).
  • Fixed: Security hardening.
  • Changed: Prefill Email Test page From field with currently logged in user email.
  • Changed: Update libraries: google/apiclient-services, google/auth, phpseclib/phpseclib and their dependecies.
  • Changed: Display in debug output cURL version if Gmail mailing failed.
  • Changed: Display in debug output OpenSSL version if it exists if Gmail/SMTP mailing failed.
  • Changed: Display plugin version in dashboard error notice when emailing failed.
  • Changed: Do not allow to send Test Email if mailer not configured properly.
  • Changed: Notify in plugin admin area that Gmail doesn’t allow to redefine From Name/Email etc.
  • Changed: List all constants with descriptions in plugin main file: wp_mail_smtp.php.
  • Changed: TGMPA: change descriptions from “Required” to “Recommended” (labels were incorrect).

1.3.3 – 2018-07-05

  • Fixed: Compatibility with other plugins, that are using Google Service or Google Client classes.
  • Changed: Optimize code loading.

1.3.2 – 2018-06-29

  • Make sure that other plugins/themes are not conflicting with our TGMPA library.

1.3.1 – 2018-06-29

  • Fixed: Other SMTP: Clear new Debug messages about failed email delivery on next successful email sending.
  • Fixed: Introduce conditional autoloader to workaround Gmail PHP 5.5 requirement and its library compatibility issues vs PHP 5.3+ minimum viable plugin version.

1.3.0 – 2018-06-28

  • Added: New option: force From Email rewrite regardless of the current value.
  • Added: New option: force From Name rewrite regardless of the current value.
  • Added: New option: remove all plugin data on plugin uninstall (when user deletes it).
  • Added: Notify site admins in wp-admin area with a notice about last failed email delivery. Cleans up on successful delivery.
  • Added: Notify site admins in wp-admin area with a notice about possible compatibility issues with other SMTP and email delivery plugins.
  • Added: Improve User Debug Experience when doing Email Test – display helpful description and steps to fix the issue.
  • Added: New users: provide default SMTP Port value for new users based on Encryption selection.
  • Added: New users: notify about not configured plugin settings.
  • Added: New users: Recommend free WPForms Lite plugin for those who don’t have it.
  • Added: SendGrid/Mailgun: provide support for multipart/alternative types of emails.
  • Added: Gmail: new button to remove connection and to connect a new Google account.
  • Fixed: Support plugin installation into /mu-plugins/ directory.
  • Fixed: SendGrid: required text/plain part of email being the first one – fixes plain text emails not having links.
  • Fixed: SendGrid and Mailgun: improperly sending plain text emails in html format.
  • Fixed: SMTP Debug output was empty in some cases.
  • Fixed: Compatibility with lots of other plugins that use Google Analytics library of different versions.
  • Fixed: “client_id is empty” is no more a problem, should be fixed.
  • Changed: For SendGrid and Mailgun allow using custom defined attachments names if present. Fallback to file name.
  • Changed: Gmail: switch to a wider scope to prevent possible issues in certain circumstances.
  • Changed: Remove whitespaces start/end of keys, secrets etc.
  • Changed: Improved helpful description tests of various options.
  • Changed: Improved plugin autoloading functionality.

1.2.5 – 2017-02-05

  • Fixed: Return path can’t be turned off.
  • Fixed: Authentication sometimes can’t be turned off.
  • Fixed: Auto TLS sometimes can’t be turned off.
  • Fixed: BCC support for Gmail was broken.
  • Fixed: Debug output improved to handle SELinux and grsecurity.
  • Fixed: Strip slashes from plugin settings (useful for From Name option).
  • Fixed: Change the way sanitization is done to prevent accidental removal of useful data.
  • Fixed: Plugin activation will not overwrite settings back to defaults.
  • Fixed: Properly set Auto TLS option on plugin activation.
  • Fixed: Providers autoloading improved for certain Windows-based installs.
  • Fixed: Use the proper path to load translations from plugin’s /languages directory.
  • Changed: Do not autoload on each page request plugin settings from WordPress options table.
  • Changed: Do not autoload Pepipost classes unless it’s saved as active mailer in settings.

1.2.4 – 2017-01-28

  • Fixed: Improved escaping in debug reporting.

1.2.3 – 2017-01-22

  • Fixed: Gmail tokens were reset after clicking Save Settings.
  • Fixed: Slight typo in Gmail success message.

1.2.2 – 2017-12-27

  • Fixed: Correctly handle Mailgun debug message for an incorrect api key.
  • Fixed: Fatal error for Gmail and SMTP mailers with Nginx web-server (without Apache at all).
  • Changed: Update X-Mailer emails header to show the real sender with a mailer and plugin version.

1.2.1 – 2017-12-21

  • Fixed: Failed SMTP connections generate fatal errors.

1.2.0 – 2017-12-21

  • Fixed: Decrease the factual minimum WordPress version from 3.9 to 3.6.
  • Changed: Improve debug output for all mail providers.

1.1.0 – 2017-12-18

  • Added: New option “Auto TLS” for SMTP mailer. Default is enabled. Migration routine for all sites.
  • Changed: Improve debug output – clear styles and context-aware content.
  • Changed: Better exceptions handling for Google authentication process.
  • Changed: Do not sanitize passwords, api keys etc – as they may contain special characters in certain order and sanitization will break those values.
  • Changed: Improve wording of some helpful texts inside plugin admin area.
  • Fixed: Do not include certain files in dependency libraries that are not used by Google mailer. This should stop flagging plugin by Wordfence and VaultPress.
  • Fixed: Constants usage is working now, to define the SMTP password, for example.
  • Fixed: Notice for default mailer.

1.0.2 – 2017-12-12

  • Fixed: PHPMailer using incorrect SMTPSecure value.

1.0.1 – 2017-12-12

  • Fixed: Global POST processing conflict.

1.0.0 – 2017-12-12

  • Added: Automatic migration tool to move options from older storage format to a new one.
  • Added: Added Gmail & G Suite email provider integration – without your email and password.
  • Added: Added SendGrid email provider integration – using the API key only.
  • Added: Added Mailgun email provider integration – using the API key and configured domain only.
  • Added: New compatibility mode – for PHP 5.2 old plugin will be loaded, for PHP 5.3 and higher – new version of admin area and new functionality.
  • 变化:管理区域的新外观。
  • 变化:SMTP密码字段现在具有“密码”类型。
  • 并未翻译!Changed: SMTP password field does not display real password at all when using constants in wp-config.php to define it.
  • 并未翻译!Changed: Escape properly all translations.
  • 变化:更有用的测试电子邮件内容(使用邮件程序名称)。