About: http://webisa.webdatacommons.org/272540259

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	The fix was a few tweaks to user.c to make it treat the absence of .qmail-default as being equivalent to having read one that said bounce-no-mailbox\n.
http://www.w3.org/ns/prov#wasQuotedFrom	acrconsulting.co.uk