http://bugzilla.spamassassin.org/show_bug.cgi?id=4242
Summary: FN on URIBL_SBL when NS for URI is IP not hostname
Product: Spamassassin
Version: 3.0.2
Platform: PC
OS/Version: FreeBSD
Status: NEW
Severity: normal
Priority: P5
Component: Plugins
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
Currently the URIBL_SBL rule which looks up the IPs of nameservers for domains
in URIs in body of email will fail to detect domains which have IPs and not
hostnames for their name server records. Spamassassin attempts to resolve the
NS record to an A record and then looks up the A record in sbl.spamhaus.org. If
NS record is already an IP no A records are returned and false negative occurs
if the "numeric" NS is in sbl. Use of numeric NS records for spamvertised
domains seems to be very frequent.
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