This is an example rails app on how to configure and use the Resend SMTP Support with Rails Action Mailer
Add these lines of code into your environment config file.
config.action_mailer.delivery_method = :smtp
config.action_mailer.smtp_settings = {
:address => 'smtp.resend.com',
:port => 465,
:user_name => 'resend',
:password => ENV['RESEND_API_KEY'],
:tls => true
}Create your mailer class
# /app/mailers/user_mailer.rb
class UserMailer < ApplicationMailer
default from: 'you@domain.io' # this domain must be verified with Resend
def welcome_email
@user = params[:user]
attachments["invoice.pdf"] = File.read(Rails.root.join("resources","invoice.pdf"))
@url = "http://example.com/login"
mail(
to: ["to@email.com"],
cc: ["cc@email.com"],
bcc: ["cc@email.com"],
reply_to: "to@email.com",
subject: "Hello from Rails",
)
end
endCreate your ERB Template for UserMailer
# /app/views/welcome_email.html.erb
<!DOCTYPE html>
<html>
<head>
<meta content='text/html; charset=UTF-8' http-equiv='Content-Type' />
</head>
<body>
<h1>Welcome to example.com, <%= @user.name %></h1>
<p>
You have successfully signed up to example.com,
</p>
<p>
To login to the site, just follow this link: <%= @url %>.
</p>
<p>Thanks for joining and have a great day!</p>
</body>
</html>Now you can send your emails, lets send it using Rails console.
bundle exec rails cInitialize your UserMailer class, this should return a UserMailer instance.
u = User.new name: "derich"
mailer = UserMailer.with(user: u).welcome_email
# => #<Mail::Message:153700, Multipart: false, Headers: <From: you@domain.io>, <To: email@example.com, email2@example.com>, <Subject: Hello World>, <Mime-Version: 1.0>...You can now send emails with:
mailer.deliver_now!
# => {:id=>"a193c81e-9ac5-4708-a569-5caf14220539", :from=>....}