Okay, but how many print-projects do you have per week? Let's say 5. How many proofs do you work through on an average project? Let's say 4, three that gets corrected and a final verison. If you have the typical customer-project manager-graphic artist project sequence, that implies a minimum of 5 x (2+4x8) = 170 e-mails/week will be sent between these 3 persons.
And what about billing? Do you have record of all the client's requests mentioned in their e-mails?
With WebProof billing almost becomes fun - you just print out the log and attach to your invoice.