mailtomarkdown.rb

require 'mail'
require 'gmail'
require 'base64'

gmail = Gmail.connect('yourname@gmail.com', 'password')

emailComeFromSomeone = gmail.inbox.find(:before => Date.parse("2012-10-01"), :after => Date.parse("2012-09-01"), :from => 'somebody@gmail.com')

emailComeFromSomeone.each do |mail|
    begin
        puts "## #{Mail::Encodings.value_decode(mail.subject)}"
        puts "\n"
        puts "*#{Date.parse(mail.date).strftime('%Y-%m-%d')}*"
        puts "\n"
        body = mail.body.decoded.split(/--[0-9a-z]{28}/)[1...-1][0]
        lines = body.split("\n")
        lines = lines[4...-1]
        lines = "=?GB2312?B?#{lines.join('')}?="
        puts "\n"
        puts Mail::Encodings.value_decode(lines)
        puts "\n"
        puts "\n"
    rescue => err
    end
end