SPFQUERY(1) User Contributed Perl Documentation SPFQUERY(1)
NAME
spfquery - (Mail::SPF) - Checks if a given set of e-mail parameters
matches a domain's SPF policy
VERSION
2.501
SYNOPSIS
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
DESCRIPTION
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.
OPTIONS
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'
RESULT CODES
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.
EXIT CODES
Result | Exit code
-----------+-----------
pass | 0
fail | 1
softfail | 2
neutral | 3
permerror | 4
temperror | 5
none | 6
EXAMPLES
spfquery --scope mfrom --id user AT example.com --ip 1.2.3.4
spfquery --file test_data
echo "127.0.0.1 user AT example.com helohost.example.com" | spfquery -f -
COMPATIBILITY
spfquery has undergone the following interface changes compared to
earlier versions:
2.500
o 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.
o The former "unknown" and "error" result codes have been renamed
to "permerror" and "temperror", respectively, in order to
comply with RFC 4408 terminology.
o 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.
o The --debug and --(no-)sanitize options are currently ignored
by this version of spfquery. They will again be supported in
the future.
o 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".
o 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
SEE ALSO
Mail::SPF, spfd(8)
<http://tools.ietf.org/html/rfc4408>;
AUTHORS
This version of spfquery is a complete rewrite by Julian Mehnle
<julian AT mehnle.net>, based on an earlier version written by Meng Weng
Wong <mengwong+spf AT pobox.com> and Wayne Schlitt <wayne AT schlitt.net>.
perl v5.26.3 2020-06-03 SPFQUERY(1)
Linux-Distributionen
Huschi als Linux-Admin