Description

If you’re still sending email with default SMTP, you’re blind to delivery problems! Postmark for WordPress enables sites of any size to deliver and track WordPress notification emails reliably, with minimal setup time and zero maintenance.

If you don’t already have a Postmark account, you can get one in minutes, sign up at https://postmarkapp.com

Check out our video on how to set up the Postmark for WordPress plugin here.

Additional Resources

Postmark for WordPress FAQ

Can I use the Postmark for WordPress plugin with Gravity Forms?

How do I send with Ninja Forms and Postmark for WordPress?

How do I send with Contact Form 7 and Postmark for WordPress?

Can I use the Postmark for WordPress plugin with Divi contact forms?

Screenshots

Postmark WP Plugin Settings screen.

Installation

Upload postmark directory to your /wp-content/plugins directory
Activate plugin in WordPress admin
In WordPress admin, go to Settings then Postmark. You will then want to insert your Postmark details. If you don’t already have a Postmark account, get one at http://postmarkapp.com
Verify sending by entering a recipient email address you have access to and pressing the “Send Test Email” button.
Once verified, then check “Enable” to override wp_mail and send using the Postmark API instead.

FAQ

What is Postmark?

Postmark is a hosted service that expertly handles all delivery of transactional webapp and web site email. This includes welcome emails, password resets, comment notifications, and more. If you’ve ever installed WordPress and had issues with PHP’s mail() function not working right, or your WordPress install sends comment notifications or password resets to spam, Postmark makes all of these problems vanish in seconds. Without Postmark, you may not even know you’re having delivery problems. Find out in seconds by installing and configuring this plugin.

Will this plugin work with my WordPress site?

The Postmark for WordPress plugin overrides any usage of the wp_mail() function. Because of this, if any 3rd party code or plugins send mail directly using the PHP mail function, or any other method, we cannot override it. Please contact the makers of any offending plugins and let them know that they should use wp_mail() instead of unsupported mailing functions.

TLS Version Requirements/Compatibility

The Postmark API requires TLS v1.1 or v1.2 support. We recommend using TLS v1.2.

You can check your TLS v1.2 compatibility using this plugin. After installing the plugin, change the dropdown for ‘Select API Endpoint’ to How’s My SSL? and run the test. If compatibility with TLS v1.2 is not detected, contact your server host or make the necessary upgrades to support TLS v1.1 or v1.2.

TLS 1.2 requires:

PHP 5.5.19 or higher
cURL 7.34.0 or higher
OpenSSL 1.0.1 or higher

Does this cost me money?

The Postmark service (and this plugin) are free to get started. You can sign up at https://postmarkapp.com/. When you need to process more email, Postmark offers monthly plans to fit your needs.

My emails are still not sending, or they are going to spam! HELP!?

No worries, our expert team can help. Just send an email to [email protected] or tweet @postmarkapp for help. Be sure to include as much detail as possible.

Why should I trust you with my email sending?

Because we’ve been in this business for many years. We’ve been running an email marketing service, Newsberry, for five years. Through trial and error we already know what it takes to manage a large volume of email. We handle things like whitelisting, ISP throttling, reverse DNS, feedback loops, content scanning, and delivery monitoring to ensure your emails get to the inbox.

Most importantly, a great product requires great support and even better education. Our team is spread out across six time zones to offer fast support on everything from using Postmark to best practices on content and user engagement. A solid infrastructure only goes so far, that’s why improving our customer’s sending practices helps achieve incredible results

Why aren’t my HTML emails being sent?

This plugin detects HTML by checking the headers sent by other WordPress plugins. If a “text/html” content type isn’t set then this plugin won’t send the HTML to Postmark to be sent out only the plain text version of the email.

Why are password reset links not showing in emails sent with this plugin?

There are a couple ways to resolve this issue.

Open the Postmark plugin settings and uncheck Force HTML and click Save Changes. If the default WordPress password reset email is sent in Plain Text format, the link will render as expected.
Access your WordPress site directory and open the wp-login.php file.

Change this line:

    $message .= ‘<‘ . network_site_url(“wp-login.php?action=rp&key=$key&login=” . rawurlencode($user_login), ‘login’) . “>\r\n”;

Remove the brackets, so it becomes:

    $message .= network_site_url(“wp-login.php?action=rp&key=$key&login=” . rawurlencode($user_login), ‘login’) . “\r\n”;

And save the changes to the file.

How do I set the from name?

The plugin supports using the wp_mail_from_name filter for manually setting a name in the From header.

Reviews

jonbhanson March 26, 2021

Postmark works great; never have any problems.

jordanrevell28 November 5, 2020

The wordpress plugin is not compatible with any wordpress version, as I used the latest one and the old one on both no plugin settings shown at backend. Test your plugin with all wordpress versions before writing tested upto 5.5.3 version. Worst plugin | Compatibility Issues

sigersmit October 28, 2020

I really love Postmark. Works flawless, support is great.

Alexandru Tapuleasa April 22, 2020

Awesome plugin and lightning fast support, thanks! 🙂

detroitwidget January 29, 2020

Exceptional product, plugin, and support.

nosilver4u September 12, 2019

If you send messages from within WordPress (password resets, invoices, etc.), this plugin is an essential part to making sure your users/customers are getting those messages. The service is always excellent, and the plugin configuration is nice and simple. Couldn't ask for more! Well, maybe I could, but nothing useful comes to mind 🙂

Read all 21 reviews

Contributors & Developers

“Postmark for WordPress” is open source software. The following people have contributed to this plugin.

Translate “Postmark for WordPress” into your language.

Interested in development?

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

Changelog

v1.13.4

Handle special characters in site titles for test emails.

v1.13.3

Additional bugfix for using wp_mail_from_name filter.

v1.13.2

Fixes error when upgrading by ensuring $postmark is set before trying to load settings.

v1.13.1

Fixes error from using incorrect filter name and mailparse_rfc822_parse_addresses function.

v1.13.0

Adds support for using the wp_mail_from_name filter to specify a from_name when sending.

v1.12.5

Fixes ‘POSTMARK_DIR is undefined’ warning when upgrading other plugins via the CLI.

v1.12.4

Fixes potential collation mismatch errors from date comparisons during old sending logs deletion.

v1.12.3

Uses count() for check of logs query result count.

v1.12.2

Corrects SQL for deletion of log entries older than 7 days.

v1.12.1

Checks if stream_name is set in settings before determining which stream to use.

v1.12

Adds support for message streams.

v1.11.6

Updates server API token location hint in plugin settings.

v1.11.5

Allows using POSTMARK_API_TEST in the plugin settings for generating test send requests that aren’t actually delivered.

v1.11.4

Fixes handling of situation where call to Postmark API results in WP_Error instead of array for response, such as during incidents of the API being offline and not returning a response.

v1.11.3

Fixes log page display of From/To addresses including the From/To names. Only email addresses will now appear in logs page, to avoid confusion, while also preserving the sanitation of email addresses before inserting into db.

v1.11.2

Fixes no index error with track links check in wp_mail.

v1.11.1

Fixes call of non-global load_settings function during upgrade.

v1.11.0

Adds link tracking support.
Fixes send test with HTML/open tracking option not being honored in sent test email.

v1.10.6

Fixes undefined index error.
Adds Upgrade Notice

v1.10.5

Corrects logs deletion cron job unscheduling issue.

v1.10.4

Removes index on logs table.

v1.10.3

Corrects version mismatch in constructor.

v1.10.1

Adds a new logging feature that can be enabled to store logs for send attempts. Logs include Date, From address, To address, Subject, and Postmark API response. Logs are displayed in a Logs tab in the plugin setting once enabled.
Switch loading of JS/CSS to use enqueue()

v1.9.6

Resolves issue when saving settings in UI.
Falls attachment Content-Type back to ‘application/octet-stream’ when other methods fail.

v1.9.5

Update javascript to fix settings update issue.

v1.9.4

Added postmark_error and postmark_response actions to the plugin, to intercept API results after calling wp_mail. You can register callbacks for these using add_action (more info here: https://developer.wordpress.org/reference/functions/add_action/)

v1.9.3

Interface cleanup
Minor code restructuring

v1.9.2

Make the errors available in the PHP variable Postmark_Mail::$LAST_ERROR if wp_mail() returns false, examine this variable to find out what happened.
When doing a test send, if an error occurs, it will be printed in the settings page header.

v1.9.1

Fix case where ‘From’ header is specified as a literal string, instead of in an associative array.

v1.9

Allow the ‘From’ header to override the default sender.
Don’t send TextBody when the user has specified the ‘Content-Type’ header of ‘text/html’
Allow individual messages to opt-in to Track-Opens by including a header of ‘X-PM-Track-Opens’ and a value of true

v1.8

Modernization of codebase.

v1.7

Support headers for cc, bcc, and reply-to

v1.6

Added open tracking support.

v1.5

Fix issue with new WordPress HTTP API Integration.

v1.4

New option to force emails to be sent as HTML. Previously just detected Content-Type.
Now uses the WordPress HTTP API.

v1.3

Resolved error with handing arrays of recipients

v1.2

Arrays of recipients are now properly handled
HTML emails and Text Emails are now handled by checking the headers of the emails sent, and sends via Postmark appropriately.
Optional “Powered by Postmark” footer of sent emails. “Postmark solves your WordPress email problems. Send transactional email confidently using http://postmarkapp.com”
Add license to README and PHP file

v1.0.0

First Public release.

WordPress.org