About: http://webisa.webdatacommons.org/202830937

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Port 25 is, as your post already says, SMTP. This means there is a mailserver installed and listening to requests on your port 25.
http://www.w3.org/ns/prov#wasQuotedFrom	askubuntu.com