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Domain footprint: jnu.edu.cn
Resolved live just now — where this domain's services actually run, with each address attributed by OrgIndex. A DNS observation, not registry data: many organisations run entirely on providers' networks and hold no IP space of their own.
Mail:
mailgw.jnu.edu.cn → GZR-CERNET
SPF sends via:
spf.jnu.edu.cn · spf.smtp-out.extmail.net
Separately, 1 organisation whose name resembles “jnu.edu.cn” — these may be unrelated to the domain above.