You can't fax a handshake

I like this expression, which is taken from a New York Times piece about Obama's recent meeting with Wall Street bankers.
On the news this week is disruption in the postal service. On a Radio 5 phone-in, I heard the anchor referring frequently to 'posties' instead of 'postmen' or 'postwomen'. I find 'postie' - a term which appears to have taken root - strangely unpleasant. I also dislike the expression 'toastie', which is used (in Liverpool anyway) for a toasted sandwich.
I shall have to mull this over at the weekend, when I'm making the mostie of my Sunday roastie.