The simple truth is that you need to be more aware of what you’re leaving for other people to hear. Sure, this doesn’t always register as a priority for users, but it’s never too late to reassess your greeting. a. Reading/Speaking in the Imperfect Tone: Tone is absolutely everything. Users don’t want to come off as being too nice, as it sounds insincere, or being too terse, as it can be interpreted as being rude. That being said, striking the right balance is absolutely essential. Your greeting exists as its own entity, and therefore, it should NOT rely on callers’ familiarity with you. Instead, it needs to appeal to the masses. As such, your inflection, i.e. the way you state your name and directions, needs to be both welcoming and firm. b. Injecting Humor & Insincerity: While humor/light heartedness can be welcoming, it can also convey a sense of informality, insincerity, and ultimately unprofessionalism. Why, because you’re not there to lend your humor or to contextualize. Instead, you’re assuming the caller has a working knowledge of your personality to ground the message. Though this might not sound like it’s all that terrible—it can be detrimental. As stated above, one should NEVER rely on a caller’s familiarity with you. Instead, aim to appeal to the masses. Humor is ultimately subjective, meaning not everyone has the same tastes; therefore, someone is bound to be turned off by a quirky or off-color remark. While implementing a light-hearted or even tongue and cheek tone can work, it’s just a really bad idea.
1.) Sie sind verbunden mit der Mailbox von Egon Mustermann .Derzeit ist Herr Mustermann nicht zu erreichen. Sie können es zu einem späteren Zeitpunkt erneut versuchen, oder hinterlassen eine Nachricht mit Ihrem Namen und Telefonnummer sodass sich Herr Mustermann zeitnah zurückmelden kann.

The attendant menu for your main contact number may be the first form of contact that a customer has with your business. Make sure your greeting is clearly articulated. Provide an option to speak with an operator if the caller has a question that is not addressed by the menu options.
2.) Sie sind mit der Mailbox von Herrn Mustermann verbunden. Bitte hinterlassen Sie eine Nachricht, damit Sie Herr Mustermann so rasch wie möglich zurückrufen kann. Vielen Dank für Ihren Anruf.