When AquaMail attempts to do a timed check for new email all accounts but gmail work. All of my gmail accounts show a red error message "! Today, x:xx AM/PM". When I tap the refresh button on each individual account or the refresh button for all accounts in the AquaMail program the gmail accounts are accessed and mail is downloaded as it should be. This has been going on now for about a month.
I am not using 2 step authentification on my gmail accounts.