Resolve Gmail Spam Filter Issue

I am sending emails from Gmail, but most of my emails are landing in the Spam folder instead of the Inbox. Requirements: 1. Check and fix email deliverability issues. 2. Set up proper email authentication: * SPF * DKIM * DMARC 3... (Budget: ₹600 - ₹1500 INR, Jobs: Bulk Marketing, DNS, Email Handling, Email Marketing)