SPF, DKIM, DMARC Setup for 5 Domains

I need help setting up SPF, DKIM, and DMARC for 5 domains on Gmail. You'll need to generate and configure the necessary records.

Requirements:
- Access to DNS settings for all domains
- Experience with Gmail and knowledge of email authentication protocols
- Ability to generate and configure SPF, DKIM, and DMARC records

Ideal Skills:
- Proficiency in DNS management
- Familiarity with email security practices
- Previous experience with similar setups

Please ensure the configurations enhance domain security and improve email deliverability.