spfquery − (Mail::SPF) − Checks if a given set of e−mail parameters matches a domain’s SPF policy
2.501
Preferred usage:
spfquery [−−versions|−v 1|2|1,2] [−−scope|−s helo|mfrom|pra] −−identity|−−id identity −−ip−address|−−ip ip-address [−−helo−identity|−−helo−id helo-identity] [ OPTIONS ]
spfquery [−−versions|−v 1|2|1,2] [−−scope|−s helo|mfrom|pra] −−file|−f filename|− [ OPTIONS ]
Legacy usage:
spfquery −−helo helo-identity −−ip−address|−−ip ip-address [ OPTIONS ]
spfquery −−mfrom mfrom-identity −−ip−address|−−ip ip-address [−−helo helo-identity] [ OPTIONS ]
spfquery −−pra pra-identity −−ip−address|−−ip ip-address [ OPTIONS ]
Other usage:
spfquery −−version|−V
spfquery −−help
spfquery checks if a given set of e−mail parameters (e.g., the SMTP sender’s IP address) matches the responsible domain’s Sender Policy Framework ( SPF ) policy. For more information on SPF see <http://www.openspf.org>.
Preferred
Usage
The following usage forms are preferred over the legacy
forms used by older spfquery versions:
The −−identity form checks if the given ip-address is an authorized SMTP sender for the given "helo" hostname, "mfrom" envelope sender e−mail address, or "pra" (so-called purported resonsible address) e−mail address, depending on the value of the −−scope option (which defaults to mfrom if omitted).
The −−file form reads "ip-address identity [helo-identity]" tuples from the file with the specified filename, or from standard input if filename is −, and checks them against the specified scope (mfrom by default).
Both forms support an optional −−versions option, which specifies a comma-separated list of the SPF version numbers of SPF records that may be used. 1 means that "v=spf1" records should be used. 2 means that "spf2.0" records should be used. Defaults to 1,2, i.e., uses any SPF records that are available. Records of a higher version are preferred.
Legacy Usage
spfquery versions before 2.500 featured the following
usage forms, which are discouraged but still supported for
backwards compatibility:
The −−helo form checks if the given ip-address is an authorized SMTP sender for the "HELO" hostname given as the identity (so-called "HELO" check).
The −−mfrom form checks if the given ip-address is an authorized SMTP sender for the envelope sender email-address (or domain) given as the identity (so-called "MAIL FROM" check). If a domain is given instead of an e−mail address, "postmaster" will be substituted for the localpart.
The −−pra form checks if the given ip-address is an authorized SMTP sender for the PRA (Purported Responsible Address) e−mail address given as the identity.
Other
Usage
The −−version form prints version
information of spfquery. The −−help form
prints usage information for spfquery.
Standard
Options
The preferred and legacy forms optionally take any of the
following OPTIONS :
−−default−explanation string
−−def−exp string
Use the specified string as the default explanation if the authority domain does not specify an explanation string of its own.
−−hostname hostname
Use hostname as the host name of the local system instead of auto-detecting it.
−−keep−comments
−−no−keep−comments
Do (not) print any comments found when reading from a file or from standard input.
−−sanitize
(currently ignored)
−−no−sanitize (currently ignored)
Do (not) sanitize the output by condensing consecutive white-space into a single space and replacing non-printable characters with question marks. Enabled by default.
−−debug (currently ignored)
Print out debug information.
Black Magic
Options
Several options that were supported by earlier versions of
spfquery are considered black magic (i.e. potentially
dangerous for the innocent user) and are thus disabled by
default. If the Mail::SPF::BlackMagic Perl module is
installed, they may be enabled by specifying
−−enable−black−magic.
−−max−dns−interactive−terms
n
Evaluate a maximum of n DNS-interactive mechanisms and modifiers per SPF check. Defaults to 10. Do not override the default unless you know what you are doing!
−−max−name−lookups−per−term n
Perform a maximum of n DNS name look-ups per mechanism or modifier. Defaults to 10. Do not override the default unless you know what you are doing!
−−authorize−mxes−for email-address|domain,...
Consider all the MXes of the comma-separated list of email-addresses and domains as inherently authorized.
−−tfwl
Perform "trusted−forwarder.org" accreditation checking.
−−guess spf-terms
Use spf-terms as a default record if no SPF record is found.
−−local spf-terms
Process spf-terms as local policy before resorting to a default result (the implicit or explicit "all" mechanism at the end of the domain’s SPF record). For example, this could be used for white-listing one’s secondary MXes: "mx:mydomain.example.org".
−−override
domain=spf-record
−−fallback
domain=spf-record
Set overrides and fallbacks. Each option can be specified multiple times. For example:
−−override example.org='v=spf1 −all'
−−override '*.example.net'='v=spf1 a mx −all'
−−fallback example.com='v=spf1 −all'
pass |
The specified IP address is an authorized SMTP sender for the identity. | ||
fail |
The specified IP address is not an authorized SMTP sender for the identity. | ||
softfail |
The specified IP address is not an authorized SMTP sender for the identity, however the authority domain is still testing out its SPF policy. | ||
neutral |
The identity’s authority domain makes no assertion about the status of the IP address. | ||
permerror |
A permanent error occurred while evaluating the authority domain’s policy (e.g., a syntax error in the SPF record). Manual intervention is required from the authority domain. | ||
temperror |
A temporary error occurred while evaluating the authority domain’s policy (e.g., a DNS error). Try again later. | ||
none |
There is no applicable SPF policy for the identity domain. |
Result | Exit code
−−−−−−−−−−−+−−−−−−−−−−−
pass | 0
fail | 1
softfail | 2
neutral | 3
permerror | 4
temperror | 5
none | 6
spfquery −−scope mfrom −−id user@example.com −−ip 1.2.3.4
spfquery −−file test_data
echo "127.0.0.1 user@example.com helohost.example.com" | spfquery −f −
spfquery
has undergone the following interface changes compared to
earlier versions:
2.500
• |
A new preferred usage style for performing individual SPF checks has been introduced. The new style accepts a unified −−identity option and an optional −−scope option that specifies the type (scope) of the identity. In contrast, the legacy usage style requires a separate usage form for every supported scope. See "Preferred usage" and "Legacy usage" for details. | ||
• |
The former "unknown" and "error" result codes have been renamed to "permerror" and "temperror", respectively, in order to comply with RFC 4408 terminology. | ||
• |
SPF checks with an empty identity are no longer supported. In the case of an empty "MAIL FROM" SMTP transaction parameter, perform a check with the "helo" scope directly. | ||
• |
The −−debug and −−(no−)sanitize options are currently ignored by this version of spfquery. They will again be supported in the future. | ||
• |
Several features that were supported by earlier versions of spfquery are considered black magic and thus are now disabled by default. See "Black Magic Options". | ||
• |
Several option names have been deprecated. This is a list of them and their preferred synonyms: |
Deprecated options | Preferred options
−−−−−−−−−−−−−−−−−−−−−+−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
−−sender, −s | −−mfrom
−−ipv4, −i | −−ip−address, −−ip
−−name | −−hostname
−−max−lookup−count, | −−max−dns−interactive−terms
−−max−lookup |
−−rcpt−to, −r | −−authorize−mxes−for
−−trusted | −−tfwl
Mail::SPF, spfd(8)
<http://www.ietf.org/rfc/rfc4408.txt>
This version of spfquery is a complete rewrite by Julian Mehnle <julian@mehnle.net>, based on an earlier version written by Meng Weng Wong <mengwong+spf@pobox.com> and Wayne Schlitt <wayne@schlitt.net>.
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.