Untitled

class SubscribersController < ApplicationController
before_action :set_subscriber, only: [:show, :edit, :update, :destroy]

 respond_to :html

  def send_welcome
  NotificationMailer.welcome(params[:id]).deliver
    redirect_to new_subscriber_path
  end

  def index
    @subscribers = Subscriber.all
    respond_with(@subscribers)
  end

  def show
    @subscriber = Subscriber.find(params[:id])
    respond_with(@subscriber)
  end

  def new
    @subscriber = Subscriber.new
    respond_with(@subscriber)
  end

  def edit
   @subscriber = Subscriber.find(params[:id])
  end

  def create
    @subscriber = Subscriber.new(subscriber_params)
    if @subscriber.save
        NotificationMailer.welcome(@subscriber)
        redirect_to posts_path, notice: "You have successfully subscribed."

    else
      render 'new'
    end

  end

  def update
    @subscriber = Subscriber.find(params[:id])
    @subscriber.update(subscriber_params)
    respond_with(@subscriber)
  end

  def destroy
    @subscriber = Subscriber.find(params[:id])
    @subscriber.destroy
    respond_with(@subscriber)
  end

  private
    def set_subscriber
      @subscriber = Subscriber.find(params[:id])
    end

    def set_email
      @email = Subscriber.find(params[:email])
    end

    def subscriber_params
      params.require(:subscriber).permit(:name, :email, :mobile)
    end
end

Notification_mailer - Welcome Method

    class NotificationMailer < ActionMailer::Base
  default from: "myemail@gmail.com"

  # Subject can be set in your I18n file at config/locales/en.yml
  # with the following lookup:
  #
  #   en.notification_mailer.welcome.subject
  #
  def welcome(subscriber)
    @subscriber = Subscriber.new(subscriber)
    @url = 'http://localhost:3000/posts'
    mail :to => "#{@subscriber.name} <#{@subscriber.email}>",
          :from => "myemail@gmail.com",
          :subject => 'Welcome to My Blog'
    end

class Subscriber < ActiveRecord::Base

     validates :name, :email, presence: true
     validates :email, uniqueness: true
     validates :email, format:
     { with: /A([^@s]+)@((?:[-a-z0-9]+.)+[a-z]{2,})z/i, on: :create }
     end

<h1>NotificationMailer#welcome</h1>

<!DOCTYPE html>
<html>
  <head>
    <meta content='text/html; charset=UTF-8' http-equiv='Content-Type' />
   </head>
  <body>
    <h1>Welcome to My Blog, <%= @subscriber.name %></h1>
    <p>
      You have successfully subscribed! <br>
    </p>
    <p>
   Please visit the site, read the post, and feel free to leave a comment,
      just follow this link: <%= @url %>.
     </p>
     <p>Thanks for joining and have a great day!</p>
  </body>
  </html>

config.action_mailer.delivery_method = :smtp
 config.action_mailer.smtp_settings = {
  address:              'smtp.gmail.com',
  port:                 587,
  #domain:               'example.com',
  user_name:            'myemail@gmail.com',
  password:             'Password',
  authentication:       'plain',
  enable_starttls_auto: true  }