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How to set up SMTP email delivery with a Gmail account

If you want to make your Rails application be capable of sending SMTP emails, check out the action mailer configuration section in the Ruby on Rails guide.

TL;DR you will end up having an smtp_settings hash that looks something like this:

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smtp_settings = { address: ..., domain: ..., port: ..., user_name: ..., password: ..., authentication: ..., tls: ..., enable_starttls_auto: ..., }

This hash can be set as the delivery_method in your environment or individually applied to an email generated in your mailer:

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# production.rb: Rails.application.configure do config.action_mailer.delivery_method = :smtp config.action_mailer.smtp_settings = smtp_settings end # test_mailer.rb def test_mail mail(to: 'mail@example.com', subject: 'Subject').delivery_method.settings.merge!(smtp_settings) end

Configuring SMTP with a Google account

These is an example configuration you can use to test if mail delivery works in your application:

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smtp_settings { address: 'smtp.gmail.com', domain: 'smtp.gmail.com', port: 587, user_name: 'your_email@google.com', password: 'google_app_password', authentication: 'login', tls: false, enable_starttls_auto: true, }

If you are using Google with 2FA, you still can deliver mails

The solution for SMTP mail delivery from a google account with two factor authentication is described here. You basically create a password that bypasses your security efforts. So make sure that you DONT GIVE IT AWAY, Google also suggests you to not write it down, etc.

Once an application no longer requires constant development, it needs periodic maintenance for stable and secure operation. makandra offers monthly maintenance contracts that let you focus on your business while we make sure the lights stay on.

Owner of this card:

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Jakob Scholz
Last edit:
about 1 month ago
by Jakob Scholz
Keywords:
google, mail
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We are makandra and do test-driven, agile Ruby on Rails software development.
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Posted by Jakob Scholz to makandra dev
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