It is important to understand that your auto-response message can go to anybody, even your top management people. Try to avoid any embarrassment by taking the time to proofread the message.
Others like to take the opportunity to inject a little personality and make the reader smile, like our very own Rachael’s summertime out-of-office:

This OoO has to be in the tech sector. I can see something like this as an (internal only) OoO at my workplace. I actually kinda love it. Yes it’s wordy but it also makes the recipient take a beat and consider the importance of their issue and where to go if needed. It will also cut down on interruptions to the “catch-all” person in the standard OoO, which is generally the Admin. I have always hated being the go-to on people’s OoOs. I spent more time trying to find info on what Urgent Emailer insisted was URGENT than I did doing any actual work. And the urgency was never really necessary.
7.) Benvenuti all’ufficio legale John Doe. Ci scusiamo, ma al momento non possiamo rispondere personalmente alla vostra chiamata, perché state chiamando durante le nostre vacanze annuali. Non esitate a inviarci una e-mail a: [email protected] – Vi contatteremo al più presto possibile al nostro ritorno. Per casi urgenti, vi preghiamo di contattare i nostri responsabili d’ufficio. Potete trovarli sul nostro sito web: www.lawoffice-johndoe.de. Grazie per la vostra chiamata – Arrivederci.