I'm a bad example but I tried to arrange a chat with my boss but he couldn't make it until the next day (nothing personal he was just busy) and I was just dying to have it done.
So I emailed him a preview of my email to all and within 5 mins he called me on my mobile laughing (in a good way) saying no problem at all and green lighted my email.
Sent email to all then kinda froze thinking "OMG what have I done" "What if....." etc. Within a few mins lovely email replies were coming back saying things like brave, well done, we're all behind you.
With each email back the burden of fear lessened. Great day
Depending on your own work though there my be varying policies that could be used against you. As suggested above best to print it and walk it over to be sure.
Best of luck and hope it all goes well