If you're no longer getting alerts for certain messages, you may want to check this, too. (cultofmac.com)
Sometimes it takes proper timing, context and setup to share certain messages, so I'm not suggesting everything should be transparent for every company. (businessinsider.com)
Certain messaging molecules (office workers) tell the proteins (mail room clerks) what to do via receptors (e-mail?). (silverhydra.com)