Boss calls out worker for "unprofessional" language after they respond to an email on their day off: 'Say that it was auto correct or something'

It's a fact of life that if you go around going above and beyond for people, people are just going to start to take if for granted. That won't be the worst of it either, because sooner or later, someone's going to take advantage of your willingness to give more than you get and start using it as an excuse to walk all over.

As an anecdote, say you have one friend in a group who goes out of her way to make unique cakes for all her friends on their birthdays; everyone just comes to expect this when their birthday rolls around and eventually stops going out of their way even to thank her. But when it's her birthday? Nothing. No one else takes up the candle to show their appreciation, not even realizing the lack of reciprocation taking place.

It's a bit like this when your boss messages you on the weekend. Respond once to move an important project forward, and they might be grateful, but respond enough times, and you're going to set an expectation of yourself. Sooner or later, your boss will start talking to you like the boss in this thread, at which point you should probably stop replying at all and reevaluate. 

This employee responded to a message between themselves, their boss, and a client organizing a meeting for Monday morning, their boss

There's almost too much irony in the fact that their usage of "auto correct" is a misspelling of the intended autocorrect—and which should have been picked up by their own autocorrect before sending off their message. This, combined with their subsequent misusage of "multi-million" as "multi million" really leads one to believe that they just really don't understand the usage of compound words and, as a result, feel threatened by them. Perhaps this is why they were so up in arms about their subordinate's "yessir" message.