With the SPF lookup you analyze the SPF record of a domain for errors, security risks and authorized IP addresses. Optionally, you can specify an IP address to check if it is authorized to send e-mail on behalf of the domain. The SPF lookup analyzes registered TXT records in real time. If you want to specify an SPF record manually, use the SPF Analyzer.
Does a valid SPF record exist?
An SPF record was found for the domain cloud-rocks.net.
The SPF record for cloud-rocks.net is not valid.
The syntax check resulted in a total of 4 errors.
of the email -Spoofing protection for this domain is not or not sufficiently provided.
Which IP-s are legitimate to send emails?
The SPF record contains a reference to external rules, which means that the validity of the SPF record depends on at least one other domain. A detailed list of the rules used externally can be found in the analysis result.
In total, 59 IP address(es) were authorized by the SPF record to send emails.
8 of these are not taken into account by the Mail Transfer Agent evaluation and are not authorized to send emails on behalf of the domain.
The SPF record analysis was performed on 10.07.2025 at 18:05:17 clock.
Have secure SPF record created by expert
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| IP | Provider / ASN | DNSBL-Check | ||
|---|---|---|---|---|
| 66.249.80.0/20
|
blacklist | |||
| 72.14.192.0/18
|
blacklist | |||
| 74.125.0.0/16
|
blacklist | |||
| 108.177.8.0/21
|
blacklist | |||
| 173.194.0.0/16
|
blacklist | |||
| 209.85.128.0/17
|
blacklist | |||
| 216.58.192.0/19
|
blacklist | |||
| 216.239.32.0/19
|
blacklist | |||
| 2001:4860:4000::/36
|
blacklist | |||
| 2404:6800:4000::/36
|
blacklist | |||
| 2607:f8b0:4000::/36
|
blacklist | |||
| 2800:3f0:4000::/36
|
blacklist | |||
| 2a00:1450:4000::/36
|
blacklist | |||
| 2c0f:fb50:4000::/36
|
blacklist | |||
| 172.217.0.0/19
|
blacklist | |||
| 172.217.32.0/20
|
blacklist | |||
| 172.217.128.0/19
|
blacklist | |||
| 172.217.160.0/20
|
blacklist | |||
| 172.217.192.0/19
|
blacklist | |||
| 172.253.56.0/21
|
blacklist | |||
| 172.253.112.0/20
|
blacklist | |||
| 108.177.96.0/19
|
blacklist | |||
| 199.255.192.0/22
|
AMAZON-02 | blacklist | ||
| 199.127.232.0/22
|
AMAZON-02 | blacklist | ||
| 54.240.0.0/18
|
AMAZON-02 | blacklist | ||
| 69.169.224.0/20
|
AMAZON-02 | blacklist | ||
| 23.249.208.0/20
|
AMAZON-02 | blacklist | ||
| 23.251.224.0/19
|
AMAZON-02 | blacklist | ||
| 76.223.176.0/20
|
AMAZON-02 | blacklist | ||
| 54.240.64.0/18
|
AMAZON-AES | blacklist | ||
| 76.223.128.0/19
|
AMAZON-02 | blacklist | ||
| 216.221.160.0/19
|
AMAZON-02 | blacklist | ||
| 206.55.144.0/20
|
AMAZON-02 | blacklist | ||
| 24.110.64.0/18
|
AMAZON-02 | blacklist | ||
| 139.178.88.99 | PACKET | blacklist | ||
| 147.75.80.249 | PACKET | blacklist | ||
| 147.75.199.223 | PACKET | blacklist | ||
| 147.75.48.161 | Equinix (EMEA) Acquisition Enterprises B.V. | blacklist | ||
| 2604:1380:45e3:2400::/64
|
PACKET | blacklist | ||
| 2604:1380:4601:e00::/64
|
PACKET | blacklist | ||
| 2604:1380:45d1:ec00::/64
|
PACKET | blacklist | ||
| 2604:1380:40f1:3f00::/64
|
Equinix (EMEA) Acquisition Enterprises B.V. | blacklist | ||
| 52.25.139.140 | AMAZON-02 | blacklist | ||
| 139.178.84.217 | PACKET | blacklist | ||
| 145.40.68.75 | PACKET | blacklist | ||
| 145.40.73.55 | PACKET | blacklist | ||
| 147.75.193.91 | PACKET | blacklist | ||
| 172.105.4.254 | Akamai Connected Cloud | blacklist | ||
| 172.234.252.31 | Akamai Connected Cloud | blacklist | ||
| 172.234.120.38 | Akamai Connected Cloud | blacklist | ||
| 172.105.64.184 | Akamai Connected Cloud | blacklist | ||
| 2604:1380:4601:e00::/64
|
PACKET | blacklist | ||
| 2604:1380:40e1:4800::/64
|
PACKET | blacklist | ||
| 2604:1380:4641:c500::/64
|
PACKET | blacklist | ||
| 2604:1380:45d1:ec00::/64
|
PACKET | blacklist | ||
| 2600:3c04:e001:324::/64
|
Akamai Connected Cloud | blacklist | ||
| 2600:3c0a:e001:78e::/64
|
Akamai Connected Cloud | blacklist | ||
| 2600:3c09:e001:7f6::/64
|
Akamai Connected Cloud | blacklist | ||
| 2a01:7e01:e001:937::/64
|
Akamai Connected Cloud | blacklist |
|
(cloud-rocks.netinclude:tometzki.deinclude:_spf.google.cominclude:_netblocks.google.com) SPF records are not identical on all name servers
_netblocks.google.com (Nameserver IP: 216.239.38.10)
v=spf1 ip4:66.249.80.0/21 ip4:72.14.192.0/18 ip4:74.125.0.0/16 ip4:108.177.8.0/21 ip4:173.194.0.0/16 ip4:209.85.128.0/17 ip4:216.58.192.0/19 ip4:216.239.32.0/19 ~allRecord >>Analyze this SPF record for domain<<
_netblocks.google.com (Nameserver IP: 2001:4860:4802:38:0:0:0:a)
v=spf1 ip4:66.249.80.0/21 ip4:72.14.192.0/18 ip4:74.125.0.0/16 ip4:108.177.8.0/21 ip4:173.194.0.0/16 ip4:209.85.128.0/17 ip4:216.58.192.0/19 ip4:216.239.32.0/19 ~allRecord >>Analyze this SPF record for domain<< |
|
(cloud-rocks.net) The SPF record of the domain exceeds the DNS lookup limit (11/10)!
At cloud-rocks.net include:tometzki.de include:_listspf.kernel.org include:_spfip6.kernel.org the limit is exceeded (RFC7208):
1: cloud-rocks.net include:tometzki.de 2: cloud-rocks.net include:tometzki.de include:_spf.google.com 3: cloud-rocks.net include:tometzki.de include:_spf.google.com include:_netblocks.google.com 4: cloud-rocks.net include:tometzki.de include:_spf.google.com include:_netblocks2.google.com 5: cloud-rocks.net include:tometzki.de include:_spf.google.com include:_netblocks3.google.com 6: cloud-rocks.net include:tometzki.de include:amazonses.com 7: cloud-rocks.net include:tometzki.de include:_listspf.kernel.org 8: cloud-rocks.net include:tometzki.de include:_listspf.kernel.org include:_listspfip4.kernel.org 9: cloud-rocks.net include:tometzki.de include:_listspf.kernel.org include:_listspfip6.kernel.org 10: cloud-rocks.net include:tometzki.de include:_listspf.kernel.org include:_spfip4.kernel.org 11: cloud-rocks.net include:tometzki.de include:_listspf.kernel.org include:_spfip6.kernel.org |
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org) Invalid mechanisms in SPF-Record!
'include:_spfip6.kernel.org' exceeds the maximum DNS lookup limit of 10 (RFC7208)(Aktuell: 11)!
OK for 'v' -> 'spf1'
OK for 'include' -> '_listspfip4.kernel.org'
OK for 'include' -> '_listspfip6.kernel.org'
OK for 'include' -> '_spfip4.kernel.org'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com → _netblocks3.google.com) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip4' -> '172.217.0.0/19'
OK for 'ip4' -> '172.217.32.0/20'
OK for 'ip4' -> '172.217.128.0/19'
OK for 'ip4' -> '172.217.160.0/20'
OK for 'ip4' -> '172.217.192.0/19'
OK for 'ip4' -> '172.253.56.0/21'
OK for 'ip4' -> '172.253.112.0/20'
OK for 'ip4' -> '108.177.96.0/19'
OK for 'all' -> '~'
|
|
(cloud-rocks.net) The SPF consists of a permissible character set.
The SPF record of cloud-rocks.net contains valid characters.
|
|
(cloud-rocks.net) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'redirect' -> 'tometzki.de'
|
|
(cloud-rocks.net → tometzki.de) The SPF consists of a permissible character set.
The SPF record of tometzki.de contains valid characters.
|
|
(cloud-rocks.net → tometzki.de) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'include' -> '_spf.google.com'
OK for 'include' -> 'amazonses.com'
OK for 'include' -> '_listspf.kernel.org'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → amazonses.com) The SPF consists of a permissible character set.
The SPF record of amazonses.com contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → amazonses.com) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip4' -> '199.255.192.0/22'
OK for 'ip4' -> '199.127.232.0/22'
OK for 'ip4' -> '54.240.0.0/18'
OK for 'ip4' -> '69.169.224.0/20'
OK for 'ip4' -> '23.249.208.0/20'
OK for 'ip4' -> '23.251.224.0/19'
OK for 'ip4' -> '76.223.176.0/20'
OK for 'ip4' -> '54.240.64.0/18'
OK for 'ip4' -> '76.223.128.0/19'
OK for 'ip4' -> '216.221.160.0/19'
OK for 'ip4' -> '206.55.144.0/20'
OK for 'ip4' -> '24.110.64.0/18'
OK for 'all' -> '-'
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com) The SPF consists of a permissible character set.
The SPF record of _spf.google.com contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'include' -> '_netblocks.google.com'
OK for 'include' -> '_netblocks2.google.com'
OK for 'include' -> '_netblocks3.google.com'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com → _netblocks3.google.com) The SPF consists of a permissible character set.
The SPF record of _netblocks3.google.com contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _listspfip4.kernel.org) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip4' -> '139.178.88.99'
OK for 'ip4' -> '147.75.80.249'
OK for 'ip4' -> '147.75.199.223'
OK for 'ip4' -> '147.75.48.161'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _listspfip4.kernel.org) The SPF consists of a permissible character set.
The SPF record of _listspfip4.kernel.org contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com → _netblocks2.google.com) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip6' -> '2001:4860:4000::/36'
OK for 'ip6' -> '2404:6800:4000::/36'
OK for 'ip6' -> '2607:f8b0:4000::/36'
OK for 'ip6' -> '2800:3f0:4000::/36'
OK for 'ip6' -> '2a00:1450:4000::/36'
OK for 'ip6' -> '2c0f:fb50:4000::/36'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com → _netblocks.google.com) The SPF consists of a permissible character set.
The SPF record of _netblocks.google.com contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com → _netblocks.google.com) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip4' -> '66.249.80.0/20'
OK for 'ip4' -> '72.14.192.0/18'
OK for 'ip4' -> '74.125.0.0/16'
OK for 'ip4' -> '108.177.8.0/21'
OK for 'ip4' -> '173.194.0.0/16'
OK for 'ip4' -> '209.85.128.0/17'
OK for 'ip4' -> '216.58.192.0/19'
OK for 'ip4' -> '216.239.32.0/19'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org) The SPF consists of a permissible character set.
The SPF record of _listspf.kernel.org contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _spfip6.kernel.org) The SPF consists of a permissible character set.
The SPF record of _spfip6.kernel.org contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _spfip6.kernel.org) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip6' -> '2604:1380:4601:e00::/64'
OK for 'ip6' -> '2604:1380:40e1:4800::/64'
OK for 'ip6' -> '2604:1380:4641:c500::/64'
OK for 'ip6' -> '2604:1380:45d1:ec00::/64'
OK for 'ip6' -> '2600:3c04:e001:324::/64'
OK for 'ip6' -> '2600:3c0a:e001:78e::/64'
OK for 'ip6' -> '2600:3c09:e001:7f6::/64'
OK for 'ip6' -> '2a01:7e01:e001:937::/64'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _spfip4.kernel.org) The SPF consists of a permissible character set.
The SPF record of _spfip4.kernel.org contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _spfip4.kernel.org) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip4' -> '52.25.139.140'
OK for 'ip4' -> '139.178.84.217'
OK for 'ip4' -> '145.40.68.75'
OK for 'ip4' -> '145.40.73.55'
OK for 'ip4' -> '147.75.193.91'
OK for 'ip4' -> '172.105.4.254'
OK for 'ip4' -> '172.234.252.31'
OK for 'ip4' -> '172.234.120.38'
OK for 'ip4' -> '172.105.64.184'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _listspfip6.kernel.org) The SPF consists of a permissible character set.
The SPF record of _listspfip6.kernel.org contains valid characters.
|
|
(cloud-rocks.net → tometzki.de → _listspf.kernel.org → _listspfip6.kernel.org) Mechanisms of SPF-Record are valid
OK for 'v' -> 'spf1'
OK for 'ip6' -> '2604:1380:45e3:2400::/64'
OK for 'ip6' -> '2604:1380:4601:e00::/64'
OK for 'ip6' -> '2604:1380:45d1:ec00::/64'
OK for 'ip6' -> '2604:1380:40f1:3f00::/64'
OK for 'all' -> '~'
|
|
(cloud-rocks.net → tometzki.de → _spf.google.com → _netblocks2.google.com) The SPF consists of a permissible character set.
The SPF record of _netblocks2.google.com contains valid characters.
|
SPF record available?
We found an SPF record for the domain.
Will be forwarded to another SPF record?
There is an SPF record that refers to another SPF record Additional entries in this record are therefore ignored.
Are the server addresses allowed to send e-mails?
In the SPF entry the mechanism 'a' has not been set.
Additionally authorized A-records?
In addition to the A-Records stored in the DNS, we could not find any other records authorized in the SPF-Record.
Are the registered mail servers allowed to send e-mails?
In the SPF entry the mechanism 'mx' has not been set
Additionally authorized MX records
We could not find any other records authorized in the SPF record besides the MX records stored in the DNS
Additionally authorized IPv4 addresses
No explicit IPv4 addresses in the SPF record have been authorised to send
Additionally authorized IPv6 addresses
No explicit IPv6 addresses in the SPF record have been authorised to send
Additional external SPF records
We could not find any other records authorized in SPF-Record
How is the sender informed?
The exp mechanism acts as a return to the sender if the IP address was not authorized to send and notify them. None was found.
PTR (obsolete mechanism)
The ptr mechanism is deprecated, slow and insecure and should not be used
PTR:
The ptr mechanism is deprecated, slow and insecure and should not be used
Authorize IP addresses with markers
When SPF is evaluated, macros can specifically authorize Ip addresses based on the request or connection of the user or client (RFC7208 )
E-Mail handling
How should the checkHost() function of the e-mail server handle the e-mail? (syntax )
Receiver address
analysis.ra-missing
Amount of reports
analysis.rp-missing
Report selection
analysis.rr-missing
Unknown mechanisms
No unknown mechanisms were found in the SPF record.
Server IP Address
We have determined the following IP address for the domain:
No domain specified
Reverse address
We have determined the following name for the server IP address:
No PTR record found
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