Over recent months I have been growing more and more fed up of the amount of junk mail finding its way past my ISP SPAM filter and the built in Junk Mail filter of OSX Mail, and so over the last week I have been investigating alternative solutions. The answer to the problem came when I received an email from Mailplaneapp.com inviting me to take part in the Beta evaluation of a new GMail app for OS X. For a long time I have had a GMail account but not …