Rails devise with gmail errors - ruby-on-rails

Question

I'm currently working on an application with a mailer system. It was working fine, sending a welcome email and sending instructions to reset password, but now and only when I try to send reset instructions I have this error.
ArgumentError (SMTP From address may not be blank: nil):
I'm using a custom domain like so noreply#mycustomdomain.com
And here is my configuration
development.rb
config.action_mailer.raise_delivery_errors = true
config.action_mailer.perform_caching = false
config.action_mailer.default_url_options = { host: 'localhost:3000' }
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
address: 'smtp.gmail.com',
port: '587',
domain: 'gmail.com',
authentication: :plain,
enable_starttls_auto: true,
user_name: Rails.application.secrets.mailer_username,
password: Rails.application.secrets.mailer_password
}
Any idea ?
Edit
class UserMailer < ApplicationMailer
default from: 'noreply#mycustomdomain.com'
def welcome_email(user)
#user = user
#url = 'http://localhost:3000/users/sign_in'
mail(to: #user.email, subject: 'Bienvenue')
end
def generate_new_password_email
user = User.find(params[:user_id])
user.send_reset_password_instructions
end
def reset_password; end
end

Answer 1

You could try setting :from in your config, using the default_option like this,
config.action_mailer.default_options = { from: 'noreply#mycustomdomain.com' }

Answer 2

It looks like you don't have a From header in your email. A good practice would be to put the following line into your ApplicationMailer:
class ApplicationMailer
default from: 'noreply#mycustomdomain.com'
# ...
end
To override this in your inheriting mailers, simply declare the same statement. To override it in individual mail methods, put it into the mail call like so:
def new_message(user, message)
mail(
to: user.email,
subject: "New message from #{message.sender.name}",
from: message.sender.email
)
end
Hope that helps

Answer 3

In devise.rb config.mailer_sender = 'please-change-me-at-config-initializers-devise#example.com' had been commented.
Config.mailer_sender was never initialized and so always nil even if I set it with default from:

Answer 4

I had the same problem, and the reason behind that was i working in development but my mailer was searching the smtp_settings in the production, so to solve the issue you can change the mailer settings or you can copy the same smtp_settings into production.

Answer 5

I stumbled upon the same problem. My solution was, I edited config/initializers/devise.rb changed a line from config.mailer_sender = 'please-change-me-at-config-initializers-devise#example.com'
to config.mailer_sender = ENV["default_from_email"]