mail-play.rb

require 'rubygems'
require 'mail'


mail = Mail.new do
  to '[email protected]'
  from '[email protected]'
  subject 'Plain text email - constructed in Ruby'
end

text_part = Mail::Part.new do
   body 'This is plain text'
 end

mail.text_part = text_part
 
puts "mail has #{mail.part.length.to_s} parts"
puts "---"

mail.part.each do |x|
  puts x.to_s
  puts "---"
end

puts "mail has #{mail.part.length.to_s} parts"