MacBook Pro overheating and drained battery due to apple mail app

It looks like the problem has been solved by simply moving to another email client. I installed Airmail and connected all four of my email addresses; 3 gmail accounts plus my iCloud email. All accounts using iCloud as I've always used them. All of my email files are showing up and working just fine. No crazy constant fans running, MacBook Pro heating up and major battery drainage as was happening the last week +. Yesterday was so out of control that I had to have it fixed before the week began.

I'm just using the free version of Airmail and don't really see a need for anymore features at this point. Relieved to have gotten this solved so easily. I could not have waited for whatever fix is needed.

Thanks for responding. I use iCloud with my gmail accounts so that I can sort and sync across devices. I wasn't having any such issues until just the last 10 days or so. Now my computer battery runs down to nothing in about 2 hours. I'm trying a different mail app and will see how it behaves over the weekend.

There is a pro version for $10/ year but I couldn't find any comparison of what that adds. I'm pretty basic with my emails other than having a pretty elaborate list of file folders.

Yes, I've been trying to make sure that my emails aren't going into any of the numerous extra files that are listed. I usually find the simpler set up is easier overall. I don't want to think I missed something because it automatically went somewhere else.