No access to older emails (more than 6 months old) on mac mail program
I am running El Capitan on an older MAC PRO (2010). Recently, in my inbox and sent folders, I am only able to access messages from the last 6 months. On the AT&T mail server, in a browser, I can search all of my emails going back many years and for some reason I can no longer do that through the mac mail app, either on my Iphone or MAC PRO. I have tried all of the solutions recommended online, from rebuilding the In and Sent mailboxes in the mail app on my MAC PRO, to deleting the files in the mail folder and having mail rebuild them when i open it. It still won't show any older emails. Again, I'v reset the setting in Mac mail preferences as suggested online, but to no avail.
On my inbox in Mac mail, the Inbox tops out at 10,000 messages.
It makes it very difficult for me to do any work!
I'm wondering if you can help me figure out why this is or if there's a setting that I need to change.