Switch Email Providers when your free Credits run out
"You have a personal Laravel app (small or medium) or you're a startup: Of course, you have a tight budget. So you probably can't spend much money on email provider services to send out your email to your users/customers.
There are a lot of email provider services out there that actually give you a specific amount or credits per month. Laravel Mail Switcher changes your credentials automatically when one of the services is running out of credits."