I'd like a tool that collects email metrics (such as throughput - how many emails travel into and out of my inbox each day).
I came to work today with 17 unprocessed (I've read them, but I have to take action on them and haven't yet) emails in my inbox. Now it's the end of the day and I still have 17. But that doesn't tell me whether I made no inbox progress at all or if I fended off 100 new ones and prevented the unprocessed count from climbing to 117.
I happen to use GMail. Are there any tools that could give me a picture of how much work I'm doing fending off incoming emails?