#app/controllers/feedback_info_controller.rb

def send_mail
 smtp = Net::SMTP.new( "smtp.yandex.ru", 587 )
 smtp.enable_starttls
 smtp.start( "yandex.ru", "my_adr@yandex.ru", "пароль", :plain ) do |conn|
 conn.send_message "Сообщение", "my_adr@yandex.ru", "получатель@rambler.ru"
end

by mx2.mail.rambler.ru (Postfix) with ESMTP id 65FF15CA8
    for <получатель@rambler.ru>; Mon, 24 Aug 2015 11:13:46 +0300 (MSK)

by forward22m.cmail.yandex.net (Yandex) with ESMTP id 488F18046B
    for <получатель@rambler.ru>; Mon, 24 Aug 2015 11:13:46 +0300 (MSK)

by smtp3m.mail.yandex.net (Yandex) with ESMTP id 2C1A127A05B8
    for <получатель@rambler.ru>; Mon, 24 Aug 2015 11:13:46 +0300 (MSK)

#app/mailers/application_mailer.rb
    class ApplicationMailer < ActionMailer::Base
    end

   #app/mailers/feedback_mailer.rb
    class FeedbackMailer < ApplicationMailer
    def feedback_email
      mail(from: 'my_adr@yandex.ru', to: 'получатель@rambler.ru', subject: 'тема')
    end
    end

   #app/controllers/feedback_info_controller.rb
    def feedback_send
       FeedbackMailer.feedback_email
    end

  #config/environments/development.rb
    config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
    config.action_mailer.delivery_method = :smtp
    config.action_mailer.smtp_settings = {
        address: 'smtp.yandex.ru',
        port: 587,
        domain: 'yandex.ru',
        authentication: 'plain',
        user_name: 'my_adr@yandex.ru',
        password: 'пароль',
        enable_starttls_auto: true
    }

config.action_mailer.smtp_settings = {
tls: true,

#development.rb
config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:tls => true,
address: 'smtp.yandex.ru',
port: 465,
domain: 'yandex.ru',
authentication: 'plain',
user_name: 'name@yandex.ru',
password: 'пароль'
}


#mailers/application_mailer.rb
class ApplicationMailer < ActionMailer::Base
end


#mailers/feedback_mailer.rb
class FeedbackMailer < ApplicationMailer

def feedback_email (name, phone, comment)
@name = name
@phone = phone
@comment = comment
mail(from: 'name@yandex.ru', to: 'adrr@example.com', subject: 'Тема письма')
end
end


#controllers/feedback_info_controller.rb
def feedback_send

@name = CGI.escapeHTML(params[:feedback_info][:name])
@phone = CGI.escapeHTML(params[:feedback_info][:phone])
@comment = CGI.escapeHTML(params[:feedback_info][:comment])

FeedbackMailer.feedback_email(@name,@phone,@comment).deliver_now
end

FeedbackMailer.feedback_email.deliver_later

config.action_mailer.default_url_options = { host: 'www.yoursite.ru' }
config.action_mailer.perform_deliveries = true
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
  tls: true,
  address: "smtp.yandex.com",
  port: 465,
  domain: "yandex.com",
  authentication: "plain",
  enable_starttls_auto: true,
  user_name: 'youremail@yandex.ru',
  password: 'yourpassword'
}