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Mail::SpamAssassin::PlUser:Contributed)Mail::SpamAssassin::Plugin::URIDNSBL(3)
NAME
URIDNSBL - look up URLs against DNS blocklists
SYNOPSIS
loadplugin Mail::SpamAssassin::Plugin::URIDNSBL
uridnsbl URIBL_SBLXBL sbl-xbl.spamhaus.org. TXT
DESCRIPTION
This works by analysing message text and HTML for URLs, extracting the
domain names from those, querying their NS records in DNS, resolving
the hostnames used therein, and querying various DNS blocklists for
those IP addresses. This is quite effective.
CONFIGURATION
uridnsbl NAME_OF_RULE dnsbl_zone lookuptype
Specify a lookup. "NAME_OF_RULE" is the name of the rule to be
used, "dnsbl_zone" is the zone to look up IPs in, and "lookuptype"
is the type of lookup (TXT or A). Note that you must also define
a body-eval rule calling "check_uridnsbl()" to use this.
Example:
uridnsbl URIBL_SBLXBL sbl-xbl.spamhaus.org. TXT
body URIBL_SBLXBL eval:check_uridnsbl('URIBL_SBLXBL')
describe URIBL_SBLXBL Contains a URL listed in the SBL/XBL blocklist
urirhsbl NAME_OF_RULE rhsbl_zone lookuptype
Specify a RHSBL-style domain lookup. "NAME_OF_RULE" is the name of
the rule to be used, "rhsbl_zone" is the zone to look up domain
names in, and "lookuptype" is the type of lookup (TXT or A). Note
that you must also define a body-eval rule calling
"check_uridnsbl()" to use this.
An RHSBL zone is one where the domain name is looked up, as a
string; e.g. a URI using the domain "foo.com" will cause a lookup
of "foo.com.uriblzone.net". Note that hostnames are stripped from
the domain used in the URIBL lookup, so the domain "foo.bar.com"
will look up "bar.com.uriblzone.net", and "foo.bar.co.uk" will look
up "bar.co.uk.uriblzone.net".
If a URI consists IP address instead of a hostname, the IP address
is looked up (using the standard reversed quads method) in each
"rhsbl_zone".
Example:
urirhsbl URIBL_RHSBL rhsbl.example.org. TXT
urirhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
Specify a RHSBL-style domain lookup with a sub-test.
"NAME_OF_RULE" is the name of the rule to be used, "rhsbl_zone" is
the zone to look up domain names in, and "lookuptype" is the type
of lookup (TXT or A).
"subtest" is the sub-test to run against the returned data. The
sub-test may either be an IPv4 dotted address for RHSBLs that
return multiple A records or a non-negative decimal number to spec-
ify a bitmask for RHSBLs that return a single A record containing a
bitmask of results.
Note that, as with "urirhsbl", you must also define a body-eval
rule calling "check_uridnsbl()" to use this.
Example:
urirhssub URIBL_RHSBL_4 rhsbl.example.org. A 127.0.0.4
urirhssub URIBL_RHSBL_8 rhsbl.example.org. A 8
uridnsbl_timeout N (default: 2)
Specify the maximum number of seconds to wait for a result before
giving up on the lookup. Note that this is in addition to the nor-
mal DNS timeout applied for DNSBL lookups on IPs found in the
Received headers.
uridnsbl_max_domains N (default: 20)
The maximum number of domains to look up.
uridnsbl_skip_domain domain1 domain2 ...
Specify a domain, or a number of domains, which should be skipped
for the URIBL checks. This is very useful to specify very common
domains which are not going to be listed in URIBLs.
perl v5.8.8 2006-Mail::SpamAssassin::Plugin::URIDNSBL(3)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Sat Sep 8 16:39:38 GMT 2007
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