I think there's some good ideas here, overshadowed by the the 350 character limit. A scannable truncated feed of all your emails is worth considering, and that's what they should be pitching.<p>The passive aggressive auto-responder is a massively bad idea though. Between clients, VIPs, and dear family members, I imagine the number of fuck you's sent to important people would massively outweigh the benefits of automated snark.<p>Let's also not forget that some companies have ridiculous email signature policies. Ours is fairly sane and I'm still looking at over 100 characters.