You can send with Gmail accounts first

Connecting with Google accounts allows you to send from:

• gmail addresses
• google workspace addresses (which are branded-gmails): florin@squirrly.net has the squirrly.net domain name, but is actually a gmail address.

Many small business owners and ecommerce owners prefer to start like this in the beginning.

To learn about sending best practices and how many emails you should send per day via gmail, please read this document.