my little mailer

2014-09-30-sample.rb

message.to = 'Person Name <[email protected]>'
message.subject = 'Sample Subject'
# body is probably good enough, but you can set text_part/html_part below if you like
message.body = <<HERE.strip
Hey-

  This is a sample

Thanks
HERE
# message.text_part = <<HERE.strip
# HERE
# message.html_part = <<HERE.strip
# HERE

config.rb.example

smtp_settings.update(
  # domain: 'myappdomain.com',
  address: 'smtp.gmail.com',
  port: 587,
  user_name: '[email protected]',
  password: '',
  authentication: 'plain',
  enable_starttls_auto:  true
)

deliver.rb

require 'bundler/inline'

gemfile(true) do
  source 'https://rubygems.org'
  gem 'mail'
end

require 'mail'
# Usage:
# ruby deliver.rb 2014-09-30-sample.rb  # preview
# ruby deliver.rb 2014-09-30-sample.rb deliver

## Configure
smtp_settings = {}
eval File.read('./config.rb')

Mail.defaults do
  delivery_method :smtp, smtp_settings
end

message_file = ARGV.shift
deliver = ARGV.shift

## Build Message
require 'ostruct'

message = OpenStruct.new
eval File.read(message_file)

mail = Mail.new do
  from     'First Last <[email protected]>'
  to       message.to
  subject  message.subject
  body     message.body
  delivery_method :smtp, smtp_settings
end

mail.html_part = Mail::Part.new do
  content_type 'text/html; charset=UTF-8'
  body message.html_part
end if message.html_part

mail.text_part = Mail::Part.new do
  body message.text_part
end if message.text_part

## Preview or Deliver
puts mail.to_s
puts
if deliver == 'deliver'
  puts 'delivering'
  puts
  puts output = mail.deliver!
  puts
  File.open(message_file, 'a') do |f|
    f.write(
      "\n" <<
      output.to_s.
        split(/\r?\n/).
        map {|l| "# #{l}" }.
        join("\n")
    )
  end
else
  puts mail.message_id
  puts
end