Email Issue on DirectAdmin with AlmaLinux

I'm currently facing an issue with my server. I've added DirectAdmin on AlmaLinux but I'm unable to send OTP emails via the server. I suspect that the issue lies with my email server settings, specifically with the SMTP configuration, which needs a thorough check and verification.

Key Requirements:
- Troubleshoot and resolve email sending issues
- Verify and configure SMTP settings
- Ensure proper sending of OTP emails

Ideal Skills:
- Server management with AlmaLinux
- DirectAdmin expertise
- SMTP configuration knowledge
- Email troubleshooting experience