In capitalism, responding in a wrong way to an email can start a chain of events that lead to you being let go, which leads to almost immediate threats to your bodily existence from lack of shelter and food. So in a way, it’s understandable to feel this level of anxiety about this situation.
It'd have to be pretty wrong to trigger that chain of events. It's definitely possible but being that wrong would probably get the sender into trouble in other economic systems as well.
Judging by the way older people treat correspondence and even verbal interactions and timing and appearances in Russia - capitalism actually alleviated this a bit.
See, in a planned economy of Soviet kind you as a worker are a resource. When you are fired from some place because they don't like you there, you are going to have hard time explaining that it wasn't a big deal to get another job (not as a janitor, I mean). And that's if they didn't write some particularly shitty thing into your labor book (there was such a thing in USSR, basically a story of all your past employments, like CV, only written by employers, which you'd bring to a new place). If they did, even becoming a janitor would be an achievement. It would be possible to become really unemployed even, and have problems with law due to this as being unemployed was illegal in USSR.
Do you prefer what I've described (no exaggerations at all, I can't make you believe me, but this is just how it normally was) to capitalism?