SPF Check

SPF Check - Verify Sender Policy Framework

With the EXPERTE.com SPF Check you can quickly and easily determine the SPF entries of a domain. Simply enter the respective domain in the field above.

You will then receive a table with the various components of the SPF entry.

SPF Record - Structure

With an SPF entry you can determine which IP addresses are authorized to send an email under your name (domain).

An SPF entry always starts with the current version number ("v=spf1"), which can be followed by various expressions. An expression has the form "qualifier" + "mechanism".

The qualifiers are:

Q.ResultDescription

+

Pass

authorized sender

-

Fail

unauthorized sender

~

SoftFail

unauthorized sender; receiver should receive message anyway

?

Neutral

sender should be classified as neutral

The main mechanisms are as follows:

M.Description

a

Matches if the domain has an A-record that matches the sender

ip4

Matches if the sender IP is in this IPv4 range

ip6

Matches if the sender IP is in this IPv6 range

mx

Matches if the domain has an MX record that matches the sender

include

References the policy of another domain. If this one is successful, the mechanism is successful

all

Always matches

SPF Record - Examples

In the following we would like to give some examples of policies:

ExampleDescription

+ip4:35.190.247.0/24

Accept all mails from the IP-range 35.190.247.0/24

include:_spf.google.com

Use the SPF policy of google.com for this domain

~all

Mark all other senders as SoftFails

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