Laravel Web App Email Functionality Repair

I'm experiencing issues with the email functionality in my Laravel web application. It is crucial for emails to be sent correctly for user registration, password resets, and order confirmations.

Key Requirements:
- Diagnose and fix the email sending issue
- Ensure correct content is being sent
- Prevent emails from being marked as spam

Ideal Skills:
- Proficiency in Laravel
- Experience with email service providers like Gmail, SendGrid, and Mailgun
- Knowledge in debugging email functionality in web applications
- Skills in ensuring email deliverability and preventing spam filtering