How to send HTML email

Question

I am creating a simple module which will be sending HTML emails to users for deals in our website.

I have searched a lot, but I can't find a solution proper solution for Drupal. Now I can send mails but plain text.

What is a step-by-step procedure to send HTML emails in Drupal 7?

function example_form_submit( $form,&$form_state) {
    $friend_email=$form_state['values']['friend_email'];
    $mailto =$friend_email;  //gift to a friend
    $mailfrom ='[email protected]';
    $subject = "another message for  HTML email from example.com";
    $body="<h2 style='font-size:28px;color:red;'>Hello EMAIL, i here i want to be <b>bolded</b></h2>";
    if (drupal_mail('example', 'send_gift', $mailto, language_default(),$params,$mailfrom,TRUE)) {
        drupal_set_message(t('Your gift was sent successfully!!!'));
    }
    else {
        drupal_set_message(t('<font color="red">Error occured while sending your mail!!!</font>'));
    }


/****hook_mail*/
function example_mail($key,&$message,$params) {
    $language = $message['language'];
    switch ($key) {
        case 'send_gift':
            $message['subject']=t($params['subject'], $var, $language->language);
            $message['body'][]=$params['body'];
            $message['headers']['Content-Type'] = 'text/html; charset=UTF-8; format=flowed';
        break;
    }
}

Answer 1

Like geoff mentioned one option would be to use the Mime Mail module, but you can also enable your custom module to send HTML e-mails with some extra code. In short you'd need to alter the mail_system variable and write your own implementation of MailSystemInterface. An example of that is the following code.

Inside 'mymodule.install':

function mymodule_enable() {
  $current = variable_get('mail_system', array('default-system' => 'DefaultMailSystem'));
  $addition = array('mymodule' => 'MymoduleMailSystem');
  variable_set('mail_system', array_merge($current, $addition));
}

function mymodule_disable() {
  $mail_system = variable_get('mail_system', array('default-system' => 'DefaultMailSystem'));
  unset($mail_system['mymodule']);
  variable_set('mail_system', $mail_system);
}

Inside 'mymodule.module':

class MymoduleMailSystem extends DefaultMailSystem {
  public function format(array $message) {
    $message['body'] = implode("\n\n", $message['body']);
    $message['body'] = drupal_wrap_mail($message['body']);
    return $message;
  }
}

You'd have to replace mymodule instances with your actual module's name then disable and re-enable your module to get the variable changed after which things should be working. For a complete example you can check out my answer here. Additionally this page on drupal.org is from where I originally got all the information from.

Answer 2

Mime Mail module is almost certainly what you are looking for.

This is a Mime Mail component module (for use by other modules).

• It permits users to receive HTML email and can be used by other modules. The mail functionality accepts an HTML message body, mime-endcodes it and sends it.
• If the HTML has embedded graphics, these graphics are MIME-encoded and included as a message attachment.
• Adopts your site's style by automatically including your theme's stylesheet files in a themeable HTML message format
• If the recipient's preference is available and they prefer plaintext, the HTML will be converted to plain text and sent as-is. Otherwise, the email will be sent in themeable HTML with a plaintext alternative.
• Allows you to theme messages with a specific mailkey.
• Converts CSS styles into inline style attributes.
• Provides simple system actions and Rules actions to send HTML email with embedded images and attachments.

Answer 3

None of the above answers worked for me, so here is my take on the original question.

First of all, install and enable the Mime Mail module. You can read the README.txt for complete instructions on how to use it. I'll give you the short version.

You need to enable Mime Mail for your module. You can do this using hook_enable or hook_update_N in example.install:

function example_enable() {
  mailsystem_set(array(
    'example_send_gift' => 'MimeMailSystem',
  ));
}

When you go to admin/config/system/mailsystem you will see that a new entry has been added for your module:

Example module (send_gift key) class

MimeMailSystem

Now you don't need to specificy any text/html headers anymore, Mime Mail takes care of this. So you don't need this:

$message['headers']['Content-Type'] = ...

If you want, you can add $message['plaintext'] to your mail for a non-HTML alternative, but this is not required.

That's it!

Answer 4

You might also want to look at the Swift Mailer module. It lets you send HTML e-mails with both inline and regular attachments (such as images or files). Furthermore, it is also capable of automatically generating plain text versions based on the HTML e-mail.

You can have a look at it http://www.drupal.org/project/swiftmailer

For the record: I'm the author and maintainer of the module.

Answer 5

You are not sending proper HTML , you are only including H1 tags and B tags, you probably need to include Full HTML tags as well starting from
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">