I don’t usually read the messages anyway, I just take it as information that the recipient won’t see my message right away. If that will cause issues, I’ll contact someone else.
What a year...you deserve a break. Use this email generator to create your custom 2020 vacation responder.

I used to work with someone who had a message telling people she only checked her email twice a day. You pretty much needed to call her if you needed anything outside of those times. (She worked in a remote office.) I think she had read one of those books on efficiency that recommended scheduled email time. But there were problems with this: 4. My department often had to email attachments or text to illustrate our questions/concerns. And we were on deadlines. Reading a page of text over the phone was not an efficient use of anyone’s time 5. She did outreach & was often out of the office on site visits, trainings, or travel to these places, but never ever set her OOO for these, because she was “working.” However, she was effectively not available to read emails from other staff until after hours on those days.
Those of us who are back in the office haven’t bothered plugging most of the phones back in. We aren’t in roles where we get phone calls, those people are still mostly WFH. There is one persistant caller who does not seem to comprehend ‘X is working from home – please email them’, but that’s the only call we ever get.