Scientists time counting does not work like that. At the end what you discovered will help people forever, how may time you spend to achieve it, is not (or at least shouldn't be) so relevant.
And a lot of the time spent in science is about painfully compiling info. Emailing people can have a lot of sense in that part.
If you spend more than 10% of your time dealing with emails instead of doing science, then you are probably on the "less" side.