short, simple version

gistfile1.rb

#!/usr/bin/env ruby
# Please insert this in your crontab
# 0 * * * * /path/to/script

CONFIG = {
  host: 'smtp.gmail.com',
  port: 587,
  user: 'shura1991',
  pass: '******',
  sender: 'shura1991@gmail.com',
  dest: 'shura1991@gmail.com'
}

require 'net/http'
require 'openssl'
require 'net/smtp'
require 'geokit'

# Net::SMTP starttls support {{{
Net::SMTP.class_eval do
  private
  def do_start(helodomain, user, secret, authtype)
    raise IOError, 'SMTP session already started' if @started

    if RUBY_VERSION > "1.8.6"
      check_auth_args user, secret if user or secret
    else
      check_auth_args user, secret, authtype if user or secret
    end

    sock = timeout(@open_timeout) { TCPSocket.open(@address, @port) }
    @socket = Net::InternetMessageIO.new(sock)
    @socket.read_timeout = 60 #@read_timeout

    check_response(critical { recv_response() })
    do_helo(helodomain)

    if starttls
      raise 'openssl library not installed' unless defined?(OpenSSL)
      ssl = OpenSSL::SSL::SSLSocket.new(sock)
      ssl.sync_close = true
      ssl.connect
      @socket = Net::InternetMessageIO.new(ssl)
      @socket.read_timeout = 60 #@read_timeout
      do_helo(helodomain)
    end

    authenticate user, secret, authtype if user
    @started = true
  ensure
    unless @started
      # authentication failed, cancel connection.
      @socket.close if not @started and @socket and not @socket.closed?
      @socket = nil
    end
  end

  def do_helo(helodomain)
    begin
      if @esmtp
        ehlo helodomain
      else
        helo helodomain
      end
    rescue Net::ProtocolError
      if @esmtp
        @esmtp = false
        @error_occured = false
        retry
      end
      raise
    end
  end

  def starttls
    getok('STARTTLS') rescue return false
  return true
  end

  def quit
    begin
      getok('QUIT')
    rescue EOFError
    end
  end
end
# }}}

ip = Net::HTTP.get(URI.parse('http://checkip.dyndns.org/')).match(/((?:[0-9]{1,3}\.){3}[0-9]{1,3})/) ? $1 : nil

if Geokit::Geocoders::YahooGeocoder.geocode(ip).country_code.upcase != "IT"
  Net::SMTP.start(CONFIG[:host], CONFIG[:port], Socket.gethostname, CONFIG[:user], CONFIG[:pass], :login) do |smtp|
    message = <<EOF
From: Son <#{CONFIG[:sender]}>
To: Mom <#{CONFIG[:dest]}>
Subject: Tits

WANT MOAR TITS
EOF
    smtp.send_message message, CONFIG[:sender], CONFIG[:dest]
  end
end