Love this post from VC Confidential:

"TIme to Get the Gmail Account" — this one comes from an entrepreneur I know well. He uses this when one of his fellow CEO’s is about to get the axe. Since this often leads to previous employers shutting off their email under their domain (and the ex-employee wants to send correspondences through other email servers), you soon end up seeing them sending emails out of an alternative provider (usually free like Hotmail, Gmail or Yahoo). So, when you hear this phrase said to you, things might not be going well at the firm…