If you work for a very serious corporation, then you will probably have stipulations to have a specific message that is written in very formal business English. However, are you sure that your out of office auto responder message is perfect in English? You do not want your English clients and customers to be put off by including some vocabulary or grammar mistakes in this essential piece of written business English correspondence. You know how to write an Out of Office auto reply in your mother-tongue language, don’t you?