premailer-rails VS LetterOpener

But this won't work in Rails out of the box. Unless you create your layouts using HTML tables and use something like the premailer-rails gem to inline your CSS (I haven't tried this approach).

I like using premailer-rails to inline the CSS in my Mailer, which allows me to have super clean views while supporting old Email clients (like Outlook).

If you input a valid email of the users you created in the system and submit the form. A POST request to http://localhost:3000/users/password will be made. Then a reset password mail as described in the previous section will be sent out. You can find that mail in the terminal running rails server. If you have a gem like letter_opener, you can see that mail shown in your browser.

Another great option is to use the letter opener gem. This is a great tool to use in development, because instead of the app actually sending the email, instead it opens a new tab on your browser with the email view. This is really helpful to see what is going on with the email as it happens. If you are using the letter opener gem, you would need to install it:

I recommend https://github.com/ryanb/letter_opener for local development.