The problem happens for users who encrypt the email using the settings under the email File dialog (File > Encrypt), ...
Classic Outlook tells you to open the email to "read its contents and verify your credentials," but that doesn't work.
How-To Geek on MSN
5 Outlook settings that instantly make your inbox cleaner
Tired of a cluttered inbox? These five Outlook tweaks will quickly cut the noise and surface the emails that actually matter.
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