I think that’s maybe something you need to deal with internally with the person/people who you’re asking people to speak to instead – I think if you start to ask the original sender to update you or cc you then it’s going to start to annoy people that they are doing the running around, plus not everyone will do it.
Set up a vacation response to let your contacts know why you’re away or out of the office and when to expect you back. You can configure separate responses to use for different domains, such as one for your Yahoo email and another for your Gmail account.

I worked somewhere that required we use them when we left for the day or if we were in meetings all day. It was rather annoying to do every single day. Now I am not at a place that requires it thankfully. I will often put one up if I leave early or if I am arriving late. Also if I am actually out of the office I will also put one up.
To remind us – as if we needed reminding, as we vainly strive for ‘inbox zero’ – of just what a time drain email has become, Kay Woodward, UK-based author of What Would She Do?, has wryly channelled one of her book’s real-life heroines, Emmeline Pankhurst (and Pankhurst’s movement’s motto) in her OOO. “Deeds, not emails. That’s what the Suffragettes need. And let’s face it, I’m probably in prison anyway, so couldn’t reply even if I wanted to.”