Only select following three options and then restart OutlookĪny updates, please feel free to post back. To do this, please go to File > Options > Trust Center > Trust Center settings > Automatic downloading. Tick the option “Read all standard mail in plain text”.Īnother option we can try is to disable downloading images from the Internet.
To do this, go to File > Options > Trust Center > Trust Center settings > Email Security. We can also try opening these messages in plain text to see they can be opened normally. You can contact this company to confirm this. If you send it to someone who is outside your company, will same error occur?Īccording to my research, a possible reason is that the message included a digital signature with pictures. It happens to anyone I send it to within the company and its only from a particular company
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