Ideally email addresses would just have different colors - internal email green, external red (as verified domain spelling and by SPF/DKIM). That would also he

Ideally email addresses would just have different colors - internal email green, external red (as verified domain spelling and by SPF/DKIM). That would also help immensely with accidental leaks of internal discussions, which is something I have to constantly watch out for with gmail (google apps).