Mail Script from Keith Bennett's Technical Blog

mail-using-gmail.rb

#!/usr/bin/env ruby
# Mails a file using GMail's SMTP Server.
# For illustrative purposes; error checking and testing intentionally omitted for brevity.
#
# Requirements: 
#   1) the 'mail' gem must be installed
#   2) a file named 'pw.txt' containing the Google password must be present
#      in the current directory.
#
# Ruby versions: tested on 1.9.3, 1.8.7, JRuby
#
# Keith Bennett

require 'rubygems' # Need this for Ruby 1.8
require 'mail'


ATTACHMENT_FILESPEC = 'attachment.txt'
File.open(ATTACHMENT_FILESPEC, 'w') do |file|
  file << "Sample attachment text file, sent #{Time.now}\n"
end


# Used for GMail authentication and the 'from' header field.
def my_gmail_address
  # Return your gmail address, e.g.:
  'me@gmail.com'
end


# Used for 'to' header field
def recipients
  # a single address or a comma separated list of email addresses, e.g.:
  'mom@aol.com,fred@people.com'
end


# GMail password for SMTP authentication.
# Create a file named 'pw.txt' and put your password there in plain text.
# Not the best way to do this!
def password
  File.read('pw.txt')
end


def body_text
  "This message contains the following attachment: #{ATTACHMENT_FILESPEC}.\nSent #{Time.now}"
end


def subject_text
  "Gmail-It Attached File: #{ATTACHMENT_FILESPEC}"
end


# This information could probably be put in the Mail.deliver block below,
# but it's here in case multiple mail calls are made.
Mail.defaults do
  delivery_method :smtp, { 
    :address              => "smtp.gmail.com",
    :port                 => 587,
    :domain               => 'gmail.com',
    :user_name            => my_gmail_address,
    :password             => password,
    :enable_starttls_auto => true  }
end
  
puts "Delivering file: #{ATTACHMENT_FILESPEC} to #{recipients}."

Mail.deliver do
  from     my_gmail_address
  to       recipients
  subject  subject_text
  body     body_text
  add_file ATTACHMENT_FILESPEC
end

puts "File #{ATTACHMENT_FILESPEC} sent."
puts "Check recipient email account(s) (#{recipients}) to verify success."