Educational organizations.
More than 6M emails from 30K world hostnames representing educational organizations with top level domain .edu.
Sources: open data, websites of educational institutions, other websites.
Data grouped by hostname.
These data represent the following structure:
Directories by a first letter of a low level hostname > Files - hostnames.
Each file contains a list of emails related to hostname.
a/acc.edu --------- name1@acc.edu /acs.edu name2@acc.edu /ade.edu ... ... b/bea.edu /ber.edu /bdd.edu ... ...(the filenames are fictitious on the diagram)