Fix Email Deliverability & Authentication and set up emails in systems such as Brevo

My client-facing messages keep landing in spam and I need that to stop. I’m running multiple senders—Outlook for day-to-day, plus Brevo and Octopus for campaigns, and we also maintain addresses in ZOHO... (Budget: $2 - $8 AUD, Jobs: Email Campaign, Email Developer, Email Handling, Email Marketing, Web Security)