Use SparkPost in SilverStripe
PHP Scheme
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SilverStripe SparkPost module

Use SparkPost in SilverStripe.

Define in your _ss_environment.php file the following constant


or by defining the api key in your config.yml

     api_key: 'YOUR_API_KEY_HERE'

This module uses a custom client (not the official PHP SDK).

You can also autoconfigure the module with the following constants in your _ss_environment.php

define('SPARKPOST_ENABLE_LOGGING',true); // Will log emails in the temp folders
define('SPARKPOST_SENDING_DISABLED',true); // Will disable sending (useful in development)

By defining the Api Key, the module will register a new mailer that will be used to send all emails.

Regiter the new mailer

If you define the SPARKPOST_API_KEY constant, the mailer will be automatically registered.

Otherwise, you need to call the following line:


One small difference from the original mailer is that it will return a fifth argument for successful emails with the result of the call to the SparkPost api.

Using custom headers

You can pass custom headers to the api by specifying any number of additionnal arguments in X-SparkPostMailer custom header.

As a convenience, you can also directly use the following custom headers : Campaign, Metadata, Description.

$email->addCustomHeader('Metadata', ['ID' => $this->ID]);

Subaccounts support

If you use a master api key, but need to limit data access, you can configure a subaccount id


or through the YML config.

SparkPost integration

This module create a new admin section that allows you to:

  • List all messages events and allow searching them
  • Have a settings tab to list and configure sending domains and webhook

NOTE : Make sure that you have a valid api key (not a subaccount key) to access features related to installation of the webhook through the CMS.

Handling errors

The mailer behaves like the default mailer. This means that if sending fails, "false" will be returned.

Any error will be logged. If you want to access the error, you can follow this kind of approach:

$result = $email->send();
if ($result) {
  $this->sessionMessage("Message has been sent", 'good');
} else {
  $this->sessionMessage("Sending failed:" . SparkPostMailer::getLastException()->getMessage(), 'bad');


From the SparkPost Admin, you can setup a webhook for your website. This webhook will be called and SparkPostController will take care of handling all events for you.

By default, SparkPostController will do nothing. Feel free to add your own extensions to SparkPostController to define your own rules, like "Send an email to the admin when a receive a spam complaint".

SparkPostController provides the following extension point for all events:

  • onAnyEvent

And the following extensions points depending on the type of the event:

  • onEngagementEvent
  • onGenerationEvent
  • onMessageEvent
  • onUnsubscribeEvent

You can also inspect the whole payload and the batch id with

  • beforeProcessPayload : to check if a payload has been processed
  • afterProcessPayload : to mark the payload has been processed or log information

You can test if your extension is working properly by visiting /sparkpost/test if your site is in dev mode. It will load sample data from the API.

Please ensure that the url for the webhook is properly configured if required by using the following configuration

  webhook_base_url: ''

You can also define the following constant to log all incoming payload into a given directory. Make sure the directory exists. It is relative to your base folder.


Please also pay attention to the fact that the webhook is called for ALL events of your SparkPost account, regardless of the fact of which API key generated the transmission.

To help you overcome this, if a subaccount id is defined, events will be filtered according to this subaccount.

Preventing spam

  • Make sure you have properly configured your SPF and DKIM records for your domain.
  • Create a DMARC record
  • Leave provide_plain option to true or provide plain content for your emails
  • Use Mail Tester to troubleshoot your issues

Inlining styles

Although SparkPost can inline styles for you, it may not work properly for complex style sheet, such as Foundation Emails. The following config can help you with this issue.

     inline_styles: true

It require the use of pelago\emogrifier so please install it if you plan to use this option.


Tested with 3.x


LeKoala -