1.) Herzlich willkommen bei Mustermann GmbH. Unsere Telefon-Hotline ist über die Festtage nicht besetzt. Genaue Öffnungszeiten erfahren sie auf unser Website unter www.mustermann.de - Wir bedanken uns für Ihr Vertrauen und wünschen Ihnen und Ihren Lieben erholsame Feiertage und ein gutes neues Jahr.
Over time, I began to suspect that those who might be telling the truth (of which I suspected there were very few), would mention their relationship to the person and possibly the cause, for example “My grandmother just passed away after surgery.” The ones who left it wide open (“someone close has recently died”) led me to imagine that it could be a random person in their city that they read about in the news, their goldfish, or perhaps a distant relative who had passed away in the previous few years.

I’m part time. I don’t use an out of office message, but I do have my hours in my signature, and sometimes include that information in the body of email. Many of the people I correspond with frequently need things turned around quickly – postings for public meetings need to go out so many days ahead of said meeting, and similar. They need to know when I’m available to get the work done!
I think that’s on the person who covered for you –presumably they are in your department. If I take care of a client for Fergus while he’s out, I let him know the problem that came in, solution, and any still pending information. Emailer emails Vickie. May not just forward the message that they sent to or received from me. Vickie gets these kinds of questions every day, doesn’t know it has anything to do with me, just answers the question. I get back, see the message, and may not realize Vickie has already handled it. That’s not Vickie’s fault. I think ENFP in Texas has it right above – before starting the work, you can ask the sender if they still need this.