An SMTP To address is required to send a message. Set the message smtp_envelope_to, to, cc, or bcc address

Question

I have super simple mailer:

class Mailer < ActionMailer::Base
  def welcome_email(email)
    @email = email
    mail to: email, subject: "[#{I18n.t 'email_subject_welcome'}"
  end
end

but when I run tests with example@gmail.com I get this error:

An SMTP To address is required to send a message. Set the message smtp_envelope_to, to, cc, or bcc address.

What should be done here?

Answer 1

How are you actually calling it in Rspec? post that code if you haven't figured it out yet. It sounds to me like the variable email is nil.

Answer 2

The problem occurred because of interceptor:

class SandboxEmailInterceptor
  def self.delivering_email(message)
    message.to = Rails.application.secrets.your_email
  end
end

ActionMailer::Base.register_interceptor(SandboxEmailInterceptor) unless Rails.env.production?

Where secrets.yml has your_email: <%= ENV["YOUR_EMAIL"] %> , and my application.yml whith email was missing.