So I booted my S8+ an hour ago to delete & add back an att.net email account & the email immediatedly began arriving in all 4 accounts as soon as it was booted---so I didn't need to delete the account
However the Note8 still hasn't received any---even after a couple of reboots. Hoping the email will come to it when I boot it tomorrow morn. (I turn off my phones while I sleep at night.)
But I'd surely like to know what AT&T is doing to cause this. This same thing occurred during 2018---so maddeningly inconvenient.