How do I setup up Mail.

I am trying to set up mail and there are some new things which I am not used to. Can any clarify if this is looking legit, or am I missing something.

.env

MAIL_MAILER=smtp
MAIL_HOST=smtp.hostinger.com
MAIL_PORT=465
MAIL_USERNAME=************************
MAIL_PASSWORD=************************
MAIL_ENCRYPTION=ssl
MAIL_FROM_ADDRESS="************************"
MAIL_FROM_NAME="************************"

RegisterUserController

Mail::to($request->email)->send(new ContactMail($details));

ContactMail

class ContactMail extends Mailable
{
    use Queueable, SerializesModels;

    public $details;

    /**
     * Create a new message instance.
     */
    public function __construct($object)
    {
        $this->details = $object;
    }

    /**
     * Get the message envelope.
     */
    public function envelope(): Envelope
    {
        return new Envelope(
            from: new Address($this->details['from'], $this->details['name']),
            subject: $this->details['subject'],
        );
    }

    /**
     * Get the message content definition.
     */
    public function content(): Content
    {
        return new Content(
            text: $this->details['content'],
        );
    }

    /**
     * Get the attachments for the message.
     *
     * @return array<int, \Illuminate\Mail\Mailables\Attachment>
     */
    public function attachments(): array
    {
        return [];
    }
}