Custom Sender Email Configuration

I need help tweaking my current mail-sending setup so that every outgoing message shows a sender address on my own domain instead of the default one my system now adds. Nothing else in the message needs to change—just the “From” field must display the custom-domain email I provide... (Budget: ₹12500 - ₹37500 INR, Jobs: API Integration, Email Handling, Email Marketing, SMTP)