WireMailgun by NB Communication

Extends WireMail to use the Mailgun API for sending emails.

WireMail Mailgun

Extends WireMail to use the Mailgun API for sending emails.


  1. Download the zip file at Github or clone the repo into your site/modules directory.
  2. If you downloaded the zip file, extract it in your sites/modules directory.
  3. In your admin, go to Modules > Refresh, then Modules > New, then click on the Install button for this module.


Prior to using this module, you must set up a domain in your Mailgun account to create an API key. Add the API key and domain to the module's settings.


Usage is similar to the basic WireMail implementation, although a few extra options are available. Please refer to the WireMail documentation for full instructions on using WireMail, and to the examples below.

Extra Methods

The following are extra methods implemented by this module:


The following methods can be used in a chained statement:

cc(string|array|null $email) - Set a "cc" email address.

  • Only used when $batchMode is set to false.
  • Please refer to WireMail::to() for more information on how to use this method.

bcc(string|array|null $email) - Set a "bcc" email address.

  • Only used when $batchMode is set to false.
  • Please refer to WireMail::to() for more information on how to use this method.

addData(string $key, string $value) - Add custom data to the email.

addInlineImage(string $file, string $filename) - Add an inline image for referencing in HTML.

addRecipientVariables(array $recipients) - Add/override recipient variables.

addTag(string $tag) - Add a tag to the email.

  • Only ASCII allowed
  • Maximum length of 128 characters
  • There is a maximum number of 3 tags allowed per email.

addTags(array $tags) - Add tags in a batch.

setApiKey(string $apiKey) - Override the Mailgun API Key module setting.

setBatchMode(bool $batchMode) - Enables or disables batch mode.

  • This is off by default*, meaning that a single email is sent with each recipient seeing the other recipients
  • If this is on, any email addresses set by cc() and bcc() will be ignored
  • Mailgun has a maximum hard limit of recipients allowed per batch of 1,000. This module will split the recipients into batches if necessary. Read more about batch sending.

*This is set to on by default if ProMailer is installed.

setCampaign() - Set campaign tracking tags.

  • An alias for addTags()
  • Each tag should be passed as an argument e.g. setCampaign('campaign1', 'campaign1-a')
  • This sets tracking on by default. To disable this, pass false as the first argument

setDeliveryTime(int $time) - The (unix)time the email should be scheduled for.

setDomainName(string $domain) - Override the "Domain Name" module setting.

setRegion(string $region) - Override the "Region" module setting.

  • Valid regions are "us" and "eu"
  • Fails silently if an invalid region is passed

setSender(string $domain, string $key) - Set a different API sender than the default.

  • The third argument is $region which is optional
  • A shortcut for calling setDomainName(), setApiKey() and setRegion()

setTestMode(bool $testMode) - Override the "Test Mode" module setting.

  • Disabled automatically for 'Forgot Password' emails from ProcessWire

setTrackOpens(bool $trackOpens) - Override "Track Message Opens" module setting on a per-email basis.

  • Open tracking only works for emails with bodyHTML() set
  • Disabled automatically for 'Forgot Password' emails from ProcessWire

setTrackClicks(bool $trackClicks) - Override "Track Message Clicks" module setting on a per-email basis.

  • Click tracking only works for emails with bodyHTML() set
  • Disabled automatically for 'Forgot Password' emails from ProcessWire

useTemplate(string $template, array $variables) - Use a Mailgun template.


send() - Send the email.

  • Returns a positive number (indicating number of emails sent) or 0 on failure.

validateEmail(string $email) - Validates a single address using Mailgun's address validation service.

  • Returns an associative array. To return the response as an object, set the second argument to false
  • For more information on what this method returns, see Mailgun's documentation.

getHttpCode() - Get the API HTTP response code.

  • A response code of 200 indicates a successful response


Basic Example

Send an email:

$mg = $mail->new();
$sent = $mg->to('user@domain.com')
	->subject('Message Subject')
	->body('Message Body')

Advanced Example

Send an email using all supported WireMail methods and extra methods implemented by WireMailgun:

$mg = $mail->new();

// WireMail methods
		'user@domain.com' => 'A User',
		'user2@domain.com' => 'Another User',
	->from('you@company.com', 'Company Name')
	->replyTo('reply@company.com', 'Company Name')
	->subject('Message Subject')
	->bodyHTML('<p>Message Body</p>') // A text version will be automatically created
	->header('key1', 'value1')
	->headers(['key2' => 'value2'])
	->attachment('/path/to/file.ext', 'filename.ext');

// WireMailgun methods
	->bcc(['bcc@domain.com', 'bcc2@domain.com'])
	->addData('key', 'value') // Custom X-Mailgun-Variables data
	->addInlineImage('/path/to/file-inline.jpg', 'filename-inline.jpg') // Add inline image
	->addTag('tag1') // Add a single tag
	->addTags(['tag2', 'tag3']) // Add tags in a batch
	->setCampaign('campaign1', 'campaign1-a') // Set campaign tracking (tags)
	->setBatchMode(false) // A single email will be sent, both 'to' recipients shown
	->setDeliveryTime(time() + 3600) // The email will be delivered in an hour
	->setSender($domain, $key, 'eu') // Use a different domain to send, this one in the EU region
	->setTestMode(true) // Mailgun won't actually send the email
	->setTrackOpens(false) // Disable tracking opens
	->setTrackClicks(false) // Disable tracking clicks
	->useTemplate('default', [
		'subject' => 'Message Subject',
		'bodyHTML' => '<p>Message Body</p>',

// Batch mode is set to false, so 1 returned if successful
$numSent = $mg->send();

echo 'The email was ' . ($numSent ? '' : 'not ') . 'sent.';

Sending in Batch Mode

// If using batch mode, the recipient variable 'name' is inferred from the `to` addresses, e.g.
$mg = $mail->new();
		'user@domain.com' => 'A User',
		'user2@domain.com' => 'Another User',
	->subject('Message Subject')
	->bodyHTML('<p>Dear %recipient.name%,</p>')

// to = A User <user@domain.com>, Another User <user2@domain.com>
// recipientVariables = {"user@domain.com": {"name": "A User"}, "user@domain.com": {"name": "Another User"}}
// bodyHTML[user@domain.com] = <p>Dear A User,</p>
// bodyHTML[user2@domain.com] = <p>Dear Another User,</p>

// Alternatively, you can omit the `to` recipients if setting `recipientVariables` explictly e.g.
$mg = $mail->new();
		'user@domain.com' => 'A User', // 'name' is inferred
		'user2@domain.com' => [
			'name' => 'Another User',
			'customVar' => 'A custom variable',
	->subject('Message Subject')
	->bodyHTML('<p>Dear %recipient.name%,</p><p>Custom: %recipient.customVar%!</p>')

// to = A User <user@domain.com>, Another User <user2@domain.com>
// recipientVariables = {"user@domain.com": {'name': "A User"}, "user@domain.com": {'name': "Another User", 'customVar': "A custom variable"}}
// bodyHTML[user@domain.com] = <p>Dear A User,</p><p>Custom: %recipient.customVar%!</p>
// bodyHTML[user2@domain.com] = <p>Dear Another User,</p><p>Custom: A custom variable!</p>
// %recipient.customVar% only prints for second email, so not a particularly useful example!

// You can also use `addRecipientVariables()` to extend/override the inferred `recipientVariables` e.g.
$mg = $mail->new();
		'user@domain.com' => 'A User',
		'user2@domain.com' => 'Another User',
		'user@domain.com' => [
			'title' => 'A User (title)',
		'user2@domain.com' => [
			'name' => 'Another User (changed name)',
			'title' => 'Another User (title)',
	->subject('Message Subject')
	->bodyHTML('<p>Dear %recipient.name%,</p><p>Title: %recipient.title%!</p>')

// to = A User <user@domain.com>, Another User (changed name) <user2@domain.com>
// recipientVariables = {"user@domain.com": {'name': "A User", 'title': "A User (title)"}, "user@domain.com": {'name': "Another User (changed name)", 'title': "Another User (title)"}}
// bodyHTML[user@domain.com] = <p>Dear A User,</p><p>Title: A User (title)!</p>
// bodyHTML[user2@domain.com] = <p>Dear Another User (changed name),</p><p>Title: Another User (title)!</p>

Validate an Email Address

$mg = $mail->new();
$response = $mg->validateEmail('user@domain.com', false);

if($mg->getHttpCode() == 200) {
	echo $response->result == 'deliverable' ? 'Valid' : 'Not valid';
} else {
	echo 'Could not validate';


If WireMailgun is the only WireMail module you have installed, then you can skip this step. However, if you have multiple WireMail modules installed, and you want WireMailgun to be the default one used by ProcessWire, then you should add the following to your /site/config.php file:

$config->wireMail('module', 'WireMailgun');


A similar module - WireMailMailgun - was initally developed by plauclair, with further development from gebeer and outflux3. WireMailgun started as a rewrite of outflux3's version, bringing the module more in line with ProcessWire conventions and coding style guide and adding some more features. WireMailgun is not compatible with these other versions.

Install and use modules at your own risk. Always have a site and database backup before installing new modules.

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