I do feel like the person who wrote it may have some issues in their organization with, oh let’s call it fire fighting. People who don’t necessarily think through the process of who would be most effective at dealing with the problem at hand. This reads like the message of someone who is used to getting everything dumped in their email and this OOO is an attempt to manage expectations and distribute issues to the people most able to quickly and effectively deal with a range of problems
“No matter what your best intentions, you're going to get bogged down the minute you return to the office,” Sullivan says. “Don't set exact timeframes for responding to messages in your OOO. Instead, set general expectations for‘I'll respond as quickly as possible upon my return,’ giving you some leeway.”

An easy win here is to be specific about your out-of-office dates, or to be upbeat about why you are out of office.
3.) Bienvenue chez l’AG de John Doe. Nos bureaux à Berlin sont maintenant fermés pour les vacances. Vous pouvez nous contacter pendant les heures de travail du Lundi ou vendredi de 9h à midi et de 13h à 18h. Pour des demandes, vous pouvez aussi nous envoyer un email sur [email protected]. Merci beaucoup. Nous vous souhaitons une bonne journée – votre AG de John Doe.