如何跨域发送邮件?

postMessage 意味着跨域消息传递是可能的。然而:

// When the popup has fully loaded, if not blocked by a popup blocker

这不是一个很清楚的问题 怎样

想象两个网站:

1. [父]托管于 qc-a.nfshost.com
2. [Child]主持时间 qc-b.quadhome.com

在父级中:

document.addEventListener('message', function(e) {
  alert('Parent got (from ' + e.origin + '): ' + e.data);

  e.source.postMessage('Round-tripped!', 'http://qc-b.quadhome.com');
}, false);

function go() {
  var w = window.open('http://qc-b.quadhome.com', 'test');

  /* This doesn't work because same-origin policy prevents knowing when
     the opened window is ready. */

  w.postMessage('Vain attempt.', 'http://qc-b.quadhome.com');
}

在孩子身上:

document.addEventListener('message', function(e) {
  alert('Child got (from ' + e.origin + '): ' + e.data);
}, false);

window.opener.postMessage('Ready!', 'http://qc-a.nfshost.com');

一切都无济于事。