Àpèjúwe
Send transactional and marketing emails from your WordPress site using the Lettr email API. Lettr replaces the default WordPress email system with a reliable, developer-friendly API that delivers emails to inboxes — not spam folders.
Why Lettr?
- Reliable email delivery — Built on battle-tested infrastructure with SPF, DKIM, and DMARC authentication out of the box.
- Simple setup — Connect your WordPress site with a single API key. No SMTP configuration needed.
- Transactional email at scale — Send password resets, order confirmations, notifications, and more through the Lettr email API.
- Real-time tracking — Monitor opens, clicks, bounces, and deliverability from the Lettr dashboard.
- Templates & personalization — Use the Lettr drag-and-drop editor and merge tags for dynamic content.
- Developer-first — RESTful API, detailed documentation, and SDKs for PHP, Node.js, Python, Go, Rust, Java, and Laravel.
How it works
This plugin overrides the default WordPress wp_mail() function and routes all outgoing emails through the Lettr API. This means every email your site sends — including emails from WooCommerce, contact form plugins, and any other plugin — is delivered through Lettr automatically.
Links
External services
This plugin connects to the Lettr API at app.lettr.com to deliver email on behalf of your WordPress site. Each time wp_mail() is invoked, the plugin sends the following data to Lettr over HTTPS so that Lettr can process and deliver the message:
- The configured sender email address and name
- Recipient, CC, BCC, and Reply-To addresses
- The email subject, HTML and/or plain text body, and any attachments
- Any custom email headers, tags, or metadata supplied by the calling code
- Your Lettr API key (sent as a Bearer token in the
Authorizationheader for authentication)
The plugin also calls app.lettr.com/api/auth/check to validate the API key when you save it on the settings screen.
This service is provided by Lettr. By using this plugin you agree to LettrÌtumọ̀ Yorùbá: ’s terms and acknowledge their privacy practices:
- Terms of Service: https://lettr.com/terms
- Privacy Policy: https://lettr.com/privacy-policy
Ìgbéwọlẹ̀
- Upload the plugin to
/wp-content/plugins/lettror install via the WordPress plugin installer. - Activate the plugin through the Plugins menu.
- Go to Settings Lettr and enter your API key from the Lettr dashboard.
- Configure your sender name and email address.
- Send a test email to verify everything is working.
FAQ
-
Do I need a Lettr account?
-
Yes. Sign up for free at lettr.com to get your API key.
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Does this work with WooCommerce?
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Yes. Lettr handles all emails sent via the standard WordPress
wp_mail()function, which includes WooCommerce order confirmations, shipping notifications, and customer emails. -
Do I need to configure SMTP?
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No. Lettr uses a REST API instead of SMTP, which means there are no ports to open or SMTP credentials to manage.
-
Where can I find my API key?
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Log in to your account at lettr.com and navigate to the API Keys section.
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Àwọn Olùkópa & Olùgbéejáde
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Àkọsílẹ̀ àwọn àyípadà
1.2.0
- Add campaigns API client methods (list, show, events, send, schedule, unschedule).
1.1.0
- Add audience API client methods (lists, contacts, topics, properties, segments).
- Bump tested-up-to to WordPress 7.0.
1.0.0
- Initial release.