from the command line get the lastest 10 emails from GMail and print the from email address. assumes ruby and rubygems are installed.

gistfile1.sh

# based on http://dcparker.github.com/ruby-gmail/
# get latest 10 email addresses from GMail inbox emails

gem install gmail

export USRENAME=my_name PASSWORD=my_password

ruby -e 'require "rubygems"; require "gmail";         \
  Gmail.new(ENV["USERNAME"], ENV["PASSWORD"]){|gmail| \
    gmail.inbox.emails.each_with_index{|email, index| \
    puts email.from.collect{|address|                 \
      "#{address.mailbox}@#{address.host}"}; break if index > 9 } }'