Open Source PHP  Library to Send Email Messages 

Getting Started with Mailer 

The recommended way to install the Mailer component is via Composer, please use the following command for easy installation.

 $ composer require symfony/mailer

Generate and Send Emails via PHP Library

The open source Mailer library has included support for email message creation and sending via PHP code. Developers need to create email objects and provide the required information. Once ready the message will be sent to the recipients via the configured transport. You can easily send emails to multiple users by selecting fields like From, To, BCC, and Cc fields. You can also easily attach files, embed images, and include other contents inside your email messages. Here is an example that shows how software developers can create and send an email messages using PHP commands.

$ composer require symfony/mailer
use Symfony\Component\Mailer\Transport;
use Symfony\Component\Mailer\Mailer;
use Symfony\Component\Mime\Email;

$transport = Transport::fromDsn('smtp://localhost');
$mailer = new Mailer($transport);

$email = (new Email())
    ->from('hello@example.com')
    ->to('you@example.com')
    //->cc('cc@example.com')
    //->bcc('bcc@example.com')
    //->replyTo('fabien@example.com')
    //->priority(Email::PRIORITY_HIGH)
    ->subject('Time for Symfony Mailer!')
    ->text('Sending emails is fun again!')
    ->html('
See Twig integration for better HTML integration!
');

$mailer->send($email);

Attach Files and Images to Emails via PHP

Sharing documents and photos as email attachments is easy and cost-effective. Moreover, it is often required to share up-to-date data and files for the timely completion of collaborative tasks. One fast and easy way to do this is via email attachments. The Mailer library enables software developers to easily attach and send documents like PDF, Microsoft Word, Images, and many more. Here is an example that shows how software developers can add attachments to an email messages inside PHP applications.

use Symfony\Component\Mime\Part\DataPart;
use Symfony\Component\Mime\Part\File;
// ...

$email = (new Email())
    // ...
    ->addPart(new DataPart(new File('/path/to/documents/terms-of-use.pdf')))
    // optionally you can tell email clients to display a custom name for the file
    ->addPart(new DataPart(new File('/path/to/documents/privacy.pdf'), 'Privacy Policy'))
    // optionally you can provide an explicit MIME type (otherwise it's guessed)
    ->addPart(new DataPart(new File('/path/to/documents/contract.doc'), 'Contract', 'application/msword'));

Email Messages Encryption Support

Encryption helps users to protect their email messages from unwanted access and prevent hackers from accessing secure data and messages. The open source Mailer library has included complete support for email message encryption using PHP commands. A certificate is used while encrypting an email message. It encrypts the entire message including attachments, images, contents, etc. Once the message is delivered the recipients that have the corresponding key can access and read the message. The following example show how programmers can use a certificate to encrypt an email message and send to recipients that have the corresponding private key to read the original message contents.

use Symfony\Component\Mime\Crypto\SMimeEncrypter;
use Symfony\Component\Mime\Email;

$email = (new Email())
    ->from('hello@example.com')
    // ...
    ->html('...');

$encrypter = new SMimeEncrypter('/path/to/certificate.crt');
$encryptedEmail = $encrypter->encrypt($email);
// now use the Mailer component to send this $encryptedEmail instead of the original email
$firstEmail = (new Email())
    // ...
    ->to('jane@example.com');

$secondEmail = (new Email())
    // ...
    ->to('john@example.com');

// the second optional argument of SMimeEncrypter defines which encryption algorithm is used
// (it must be one of these constants: https://www.php.net/manual/en/openssl.ciphers.php)
$encrypter = new SMimeEncrypter([
    // key = email recipient; value = path to the certificate file
    'jane@example.com' => '/path/to/first-certificate.crt',
    'john@example.com' => '/path/to/second-certificate.crt',
]);

$firstEncryptedEmail = $encrypter->encrypt($firstEmail);
$secondEncryptedEmail = $encrypter->encrypt($secondEmail);

Use Tags and Metadata in Emails

The open source Mailer library has included support for adding tags and metadata to your email messages with ease. They are very useful for grouping emails together, tracking emails, and workflow. Please remember that your transport will convert them to their appropriate format if it supports headers otherwise it does not support tags and metadata, they will be added as custom headers inside your emails.