Is the import script only using the first line, as that is the email that is being used for the user rather than the correct one, user@pctresources.com?
It should really be using “X-Original-From”, do we have any control over that?
Neither Original-From nor X-Original-From are currently supported by the import script.
You could modify the import script (feel free to create a pull request) or use some regex magic on your source files to remove the From: header and rename the X-Original-From: header to From: