Search by message header in Content Search
There is currently no way to search for e-mails with specific header values. It would be extremely useful to be able to search message header fields in content searches.
My specific use case is for security investigations. There are times when we can identify a threat actor's e-mails by a message header value, but we don't know the specific sending or receiving e-mail address or domain.
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Joseph Demmelmaier
commented
I would highly appreciate this feature as well in order to filter by encryption status of email messages (RMS protected yes/no).