Need help writing Out Of Office message due to limited work availability.

Hi! I need some advice/help writing my email Out Of Office message.. here are the details:

I worked this position prior to getting pregnant and during my pregnancy. To put it kindly, the boss is a complete jerk. I had planned to quit after my maternity leave was over but the boss agreed to allow me to work when I was available, not a set schedule, WFH, and around my family/child's needs. I thought great, limited exposure to jerk boss and extra income coming in, win/win.

At the beginning jerk boss respected my boundaries but before I knew it, I was working during my child's naps, while he was awake (I was on numerous conference calls while nursing 🤦‍️), working night/weekends, texts/calls all day and evening – I am burnt out.

All this lead to me saying enough is enough, from 1/15/23 on I will ONLY work nights/weekends based on my discretion and it will not be every night or every weekend. I will no longer be the “everyday” point person and only work on special projects. I very bluntly told jerk boss that he needed to hire someone ASAP to fill the day to day role. I gave him over a month notice on this.

So he hired someone. Yay! I have been maxing myself out to get the new hire up to speed before my 1/15 step away date. Jerk boss continues to throw more at me, saying in multiple emails to clients that I am the “point person” making it impossible for me to train the new hire and complete any actual work. Then he hounds me about why we haven't trained on x, y, z – blah, blah blah – Y'all know the drill. He's had the new hired almost in tears and she's been with us for three weeks. 🤦‍️

I don't expect jerk boss to respect my newly enforced boundary of only nights/weekend and my discretion so I want to set my Out Of Office to reflect my new availability. Note, I have the capability to set two different messages one for internal people and one for external AND I plan to email all my contacts (cc'ing jerk boss and new hire) notifying them if the change.

If you made it this far, much appreciated!

So how do I write the out of office message? Is it as simple as “I work limited hours effective 1/15/2023, please contact as she it you contact going forward.” ?

Note, the company is a manufacturing company and I am in the sales/marketing department. So limited “fluff” is needed in the message. I am the “Jill of all trades” for the department/company and untimely jerk boss directs anyone and everyone to me regardless of if it's something I handle/do or not.