What we need in our work communication is not more professional politeness or less formal, chat-based messaging applications like Slack. We need honesty. The problem is that we’ve conditioned ourselves to see honesty as self-indulgent or disrespectful. I’d argue the opposite is true. Honesty, even if it’s a bit more inconvenient for all parties in the moment, pays dividends later. It builds trust. When my partner Anne Helen Petersen and I were interviewing people for our forthcoming book on remote work, a frequent lament from both middle managers and workers was that they didn’t feel like they knew how to succeed in their jobs; that they were guessing what their superiors and coworkers wanted and, even when they asked, they didn’t quite trust the responses they got back.
We had someone today that sent an inquiry about something (this person is not a client, more of an outside business partner). Dude sent, within about an hour and a half time frame, 7 emails. Calling out one person on the DL multiple times within a half hour, then proceeding to call out the rest of the DLs (ALL in the original copy list) to try to get an answer to his question.

No. 1 Out of office messages for lead generation:- In order to build trust and expand more sales, you are in two-way doubt whether your out-of-office email response will be ready by someone in your absence.
Hello, I will be out of the office [DATE] through [DATE] returning [DATE]. If you need immediate assistance during my absence, please contact [CONTACT NAME] at [EMAIL]. Otherwise, I will respond to your emails as soon as possible upon my return. Warm regards.