> if you can't depend on Rails and co being flexible enough to do what you want, you might as well build on a less-opinionated framework from the start and skip

> if you can't depend on Rails and co being flexible enough to do what you want, you might as well build on a less-opinionated framework from the start and skip the step of trying to bend Rails into shape. Sending email is one of the things rails does out of the box. ActionMailer is builtin. I myself use mailgun as the provider - it took me 5 minutes going. But there are plenty of ways to do it for what your needs are. Rails has an opinion on how to do things, but you can do your own thing too. Those opinions it comes with let you ship better code faster, and allow you to focus on the real problems of your project. But rails, in my 8 years of working every day with it across a multitude of projects, has never been not flexible enough.