For those cases, https://mandrillapp.com/ https://mandrillapp.com/ is good. It's fast to setup and free for less than 12 000 emails. It's my go to email provide

For those cases, https://mandrillapp.com/ https://mandrillapp.com/ is good. It's fast to setup and free for less than 12 000 emails. It's my go to email provider for all side projects (do not forget to set DKIM and SPF though, otherwise your emails will be marked as being sent via mandrill in gmail and a few email softwares)