If you plan on ramping up your outbound efforts and will be sending out a few hundred emails per day, I highly recommend you set up a “burner domain.”
Running outbound email campaigns can jeopardize your main domain’s reputation. You do NOT want to do that.
So you want to use a different domain for your cold email outreach, than you do for all other communications, such as everyday email, marketing’s newsletter, transactional receipts, etc.
A “burner domain” is an alternative domain you buy to use specifically for cold email outreach.
If your main domain is example.com a burner domain would be getexample.com or example.io. In fact, there are a myriad of choices you can use. Each domain costs around $10, so having several is recommended.
Under this “burner domain,” set up email accounts that will be used exclusively for your outbound campaigns. Set up your G-Suite as you normally would.
Next, you will want to ensure your burner domain has the following DNS records created: