Mail constantly downloading messages

Hi all,

I've recently performed a clean install of OS X El Capitan on my mid 2102 Macbook Pro (Non Retina) and restored on to it my user folder and settings from before the installation (I was running the latest update of OS X Yosemite).

Since then, I have experienced an issue where Mail constantly lists in its activity that it's downloading messages.

The amount of message varies from time to time and would range between 1,000 to 100,000 messages.

This issue occurs several times every hour.

Obviously, I don't get more than a 1,000 messages every few minutes and the size of the files on my disk stays the same, so these are definitely the same messages Mail had already downloaded when I initially performed the account setup.

The reason this bothers me is that it slows down the performance of my Mac, especially when working in Mail (which is one of my top 3 apps in OS X).

In addition, it severely drains the battery.

I've seen several posts with no solution that helped me fixed the issue.

I tried to disable and enable the account and I've also tried to recreate the account.

I tried to follow the steps provided at http://www.needhelp4mac.com/2015/10/troubleshooting-apple-mail-in-os-x-10-11-el- capitan/ which I saw posted in a similar thread - Mail constantly downloading messages | How to reset Mail?

However, all of these steps did not solve my issue.

My account type is an Exchange account and I'm running the latest 10.11.1 update.

If anyone has any other idea of something I could try, please let me know.

Any help would be much appreciated.

Thanks,

Yair.