Find and edit the file rsreportserver.config. Locate the section for the Report Server Email extension. Modify the default host name and permitted host name sections and add your domain information.
Example:
<DefaultHostName>domain.company.com</DefaultHostName>
<PermittedHosts>
<HostName>domain.company.com</HostName>
</PermittedHosts>
Restart Reporting services to pick up the changes.
Jeffrey Williams
“We are all faced with a series of great opportunities brilliantly disguised as impossible situations.”
― Charles R. Swindoll
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