An SMTP to address is required to send a message

Question

I am trying to send a reset password email with Devise.

Error:

: An SMTP To address is required to send a message. Set the message smtp_envelope_to, to, cc, or bcc address.
from /app/vendor/bundle/ruby/2.1.0/gems/mail-2.5.4/lib/mail/check_delivery_params.rb:9:in `check_delivery_params'
from /app/vendor/bundle/ruby/2.1.0/gems/mail-2.5.4/lib/mail/network/delivery_methods/smtp.rb:98:in `deliver!'
from /app/vendor/bundle/ruby/2.1.0/gems/mail-2.5.4/lib/mail/message.rb:2129:in `do_delivery'
from /app/vendor/bundle/ruby/2.1.0/gems/mail-2.5.4/lib/mail/message.rb:234:in `deliver'
from (irb):27
from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.2/lib/rails/commands/console.rb:90:in `start'
from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.2/lib/rails/commands/console.rb:9:in `start'
from /app/vendor/bundle/ruby/2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:62:in `<top (required)>'

I tried constructing a mail object manually:

mail = Mail.new do
  from    'name@mydomain.com'
  to      'name@mydomain.com'
  subject 'This is a test email'
  body    File.read('body.txt')
end

and running mail.smtp_envelope_to returns [] . When I ran mail.To = 'name@mydomain.com', mail.smtp_envelope_to returns ["name@mydomain.com"].

Why am I getting this error?

EDIT: SMTP_SETTINGS

if Rails.env.staging? || Rails.env.production?
  SMTP_SETTINGS = {
    address: ENV['SMTP_ADDRESS'], # example: 'smtp.sendgrid.net'
    authentication: :plain,
    domain: ENV['BASE_URL'], # example: 'this-app.com'
    password: ENV['SENDGRID_PASSWORD'],
    port: '587',
    user_name: ENV['SENDGRID_USERNAME']
  }
end

EDIT: the missing quote was a bad re-type. See the SMTP_SETTINGS for my Rails code. The first block of code is me trying to reproduce the mail error from the console.

Answer 1

Turns out a Gem from Suspenders I thought I removed, recepient-interceptor, was left in.

Removing that fixed the issue.