A French company recently announced it was banning internal email and in typical French fashion, without a trace of irony, it is an IT company.
It an interesting experiment. Sure there is a certain amount of correspondence that needs to be documented [in our industry rate agreements, approvals, amendments], but the majority of these are external and even then probably don't account for more than a small fraction of the daily deluge.
Actual conversations are so important in an industry built on relationships. And unless you are a secretary on Mad Men, talking is immeasurably faster than typing.
So, before you send that email, pick up the phone, or go for a stroll. Have a chat and let serendipity take its course. Some of the best ideas come from an idle chat around the photocopier...