Comment 13 for bug 376523

I'm seeing this exact same problem, Pedro. If I use my system's default proxy settings -- which are:

  http_proxy=http://cache.async.com.br:3128
  no_proxy=localhost,127.0.0.0/8,*.local

Then evolution fails to contact google calendar and just tells me "no response from server". If I change Evolution's proxy settings to say "direct connection" then it works fine. I'm not sure if this is a port issue -- perhaps my outbound proxy server doesn't allow connections to the default ICS port.