When I tried to use the rdm-mailhanlder.rb script with a https URL, I got the following error.

/usr/lib/ruby/1.8/net/http.rb:2022:in `read_status_line': wrong status line: "" (Net::HTTPBadResponse)
        from /usr/lib/ruby/1.8/net/http.rb:2009:in `read_new'
        from /usr/lib/ruby/1.8/net/http.rb:1050:in `request'
        from /usr/lib/ruby/1.8/net/http.rb:405:in `post_form'
        from /usr/lib/ruby/1.8/net/http.rb:543:in `start'
        from /usr/lib/ruby/1.8/net/http.rb:404:in `post_form'
        from /opt/rails/redmine/extra/mail_handler/rdm-mailhandler.rb:62:in `submit'
        from /opt/rails/redmine/extra/mail_handler/rdm-mailhandler.rb:112

I search around the internet and created a patch for this. Based on http://www.missiondata.com/blog/ruby/65/building-a-better-world-with-google-spreadsheets/.

Redmine version: trunk (revision 1711)
rdm-mailhandler.rb: revision 1643
Ruby version: ruby 1.8.6 (2007-09-24 patchlevel 111)