Odoo CRM Spam Issue Fix

I need an experienced Odoo expert to resolve an issue with emails from our Odoo CRM landing in recipients' spam/junk folders.

System Details:
- Odoo is installed on our own server, running on local IP within our company network.
- The server’s public IP is closed, only accessible via local IP.
- We have DNS configured through Cloudflare, but no public IP added.
- The system works properly within the company network.

Requirements:
- Troubleshoot and resolve the spam issue.
- Check and configure email settings (DNS records, SPF, DKIM, etc.).
- Advise if additional setup (e.g., SMTP, relay, public IP) is required.
- Ensure a reliable, inbox-safe email sending process for Odoo CRM.

Ideal Skills and Experience:
- Odoo email configuration expertise
- Strong knowledge of DNS, SPF, DKIM, and DMARC setup
- Experience with Office 365 integration
- Ability to troubleshoot email delivery issues

Please apply only if you have relevant Odoo email configuration experience.