Unusual Square icon in Sent mail
I am using Catalina Version 10.15.2 on an iMac (Late 2012).
I recently reset two mail accounts which had been receiving mail without an issue. Upgrades from Bluehost caused server info to change, so we had to fix that. I am now able to send and receive mail but there are no longer visible saved emails in the sent boxes. While emails appear to have been sent I cannot find the email in my sent mail and there is a square icon I have never seen next to any mailbox. (See attached screen cap.)
Test emails show the mail was actually sent, but I can not access or see the sent mail.
This behavior is unique to two mailboxes reset by host company - all other mailboxes perform as expected.
Please help! Thanks!
iMac Line (2012 and Later)