why is devise not sending email via gmail smtp? - ruby-on-rails

Question

I am using devise for authentication. It provides a forgot password link. When i send email then the email is not sent. Following is the settings i have used. Can you tell me why gmail is not sending the email? I have also turned on "allow less secure app to send email" and i have also enabled imap in gmail setting.
application.rb has the following setting.
ActionMailer::Base.smtp_settings = {
:address => 'smtp.gmail.com',
:domain => 'mail.google.com',
:port => 587,
:user_name => 'validemail#gmail.com',
:password => 'validpassword',
:authentication => 'login',
:enable_starttls_auto => true
}
development.rb has
config.action_mailer.default_url_options = { host: '127.0.0.1'}
config.action_mailer.delivery_method = :smtp
After sending the email i get the following text in the console.
Devise::Mailer#reset_password_instructions: processed outbound mail in 215.2ms
Sent mail to validemail#gmail.com (1097.6ms)
Date: Thu, 29 Dec 2016 09:50:41 +0000
From: please-change-me-at-config-initializers-devise#example.com
Reply-To: please-change-me-at-config-initializers-devise#example.com
To: validemail#gmail.com
Message-ID: <5864dc7161acb_173921a07788707d#kofhearts-rubyonrails-3267120.mail>
Subject: Reset password instructions
Mime-Version: 1.0
Content-Type: text/html;
charset=UTF-8
Content-Transfer-Encoding: 7bit
<p>Hello validemail#gmail.com!</p>
<p>Someone has requested a link to change your password. You can do this through the link below.</p>
<p>Change my password</p>
<p>If you didn't request this, please ignore this email.</p>
<p>Your password won't change until you access the link above and create a new one.</p>
Redirected to https://rubyonrails-kofhearts.c9users.io/users/sign_in
Completed 302 Found in 1965ms (ActiveRecord: 14.7ms)
UPDATE:
I am just following this tutorial.
https://www.youtube.com/watch?v=ZEk0Jp2dThc
Send email is not working with the settings that are specified in this video.

Answer 1

Enabling less secure apps in my account settings worked for me.
Google Account settings > Signing in to Google > scroll down to the bottom
Turn on allow less secure apps. Try sending the email again.

Answer 2

That's should work.
Maybe you could also turn on config.action_mailer.raise_delivery_errors = true
in config/environments/development.rb.
It's easier to debug.
Maybe you forget to set config.action_mailer.perform_deliveries = true in config/environments/development.rb?

Answer 3

Have you tried this?
config.action_mailer.default_url_options = { :host => 'localhost:3000' }
ActionMailer::Base.smtp_settings = {
:address => "smtp.gmail.com",
:port => 587,
:domain => "gmail.com",
:user_name => "myinfo#gmail.com",
:password => "secret",
:authentication => "plain"
# :enable_starttls_auto => true # I don't have this, but it should work anyway
}
it it's sent maybe you don't receive it because of the spam filter, first thing to check:
class UserMailer < ActionMailer::Base
default :from => "myinfo#gmail.com"
# ...
end
You also check your Forwarding and POP/IMAP in your gmail..
include these line of codes on your development.rb
config.action_mailer.default_url_options = {host: 'your server' } # ex. localhost:3000
config.action_mailer.raise_delivery_errors = true # to raise error if smtp has error on setup
config.action_mailer.default :charset => "utf-8"

Answer 4

If you are working with Gmail you should activate permission to
externals apps send email through SMTP.
In development mode Rails does not send emails, you should run Rails in production rails s -e production or turn on config.action_mailer.raise_delivery_errors = true
do not forget to use mail().deliver or for Rails 5+ mail().delivery_now
look you this is my SMTP configuration
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address => ENV['mailer_address'],
:port => ENV['mailer_port'],
:user_name => ENV['mailer_username'],
:password => ENV['mailer_password'],
:authentication => "plain",
:enable_starttls_auto => true
}
this is my Class Mailer
def send_email
mail(to: "example#email.com", subject: 'not reply this message').deliver
end
I call that function from my controller. If you got any error you should print it to check what is the problem.
begin
myMailer.send_email
rescue Exception => e
flash[:error] = "Imposible sent email, #{e.inspect}"
end