Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi George
I have started experiencing this issue this week (23rd July 2020) and appear to have solved it using your suggested solution. I was having the additional issue that when I clicked on the email to view it in reading pane, the email took some time to fully load, with a blue wheel circling for quite a while (presumably searching for a non-existent sender image?)
I am using Outlook 365 on the web, not the installed version, and the route to the appropriate setting is different:
Go to Settings (cog icon) - View all Outlook Settings - Mail
Scroll down to Sender Image and select radio button Don't Show Sender Images
Thank you for your help.
Disabling sender images fixed it for me I am a 365 webmail user. Make sure to logout and log back into webmail after making the change.