Intigrate SendGrid EMAIL API in PHP/ laravel

1) First Install Sendgrid/sendgrid  package 

    composer install sendgrid/sendgrid

2) Add API key in .env file If you are using laravel  like this 

MAIL_DRIVER=sendgrid

MAIL_HOST=smtp.sendgrid.net

MAIL_PORT=587

MAIL_USERNAME=sendgrid_username

MAIL_PASSWORD=sendgrid_password

MAIL_ENCRYPTION=tls

SENDGRID_API_KEY=sendgrid_api_key

3) In controller add sendgrid Mail() api

    public function sendEmail(){

    $email = new \SendGrid\Mail\Mail();

    $email->setFrom("userfrom@mail.com", "My Website");

    $email->setSubject("I'm replacing the subject tag");

    //You can send variables values on sendgrid templates using addTO

    //I've sent 2 variables in array with keys username, useremail

    // In send grid template i used {{username}} and {{useremail}} to get dynamic values

    $email->addTo(

        'admin@mail.com',

        "Example User1",

        [

            "username" => ucwords($user->name),

            "useremail" => ucwords($user->email)

        ]

    );

    $email->setTemplateId("YOUT TEMPLATE ID");

    $sendgrid = new \SendGrid('YOUR KEY HERE');

    try {

        $response = $sendgrid->send($email);

        dd('Mail Sent');

        //print $response->body() . "\n";

    } catch (Exception $e) {

        echo 'Caught exception: ' .  $e->getMessage() . "\n";

    }

}

That it  thank you  for more details check here ... 

 https://usingphp.com/post/send-transactional-email-with-sendgrid-in-laravel