SPF Check:
eon.de

1. Specify domain name

Enter a domain to be checked for the SPF record
2. Specify IP address (optional)
Enter any IP address to check if it is authorized to send e-mails by the SPF record

What is the SPF lookup for?

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.

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SPF check passed

Your SPF record check result
  •   SPF record found
  •   Syntax check: 0 errors
  •   Email Anti-Spoofing: Good
Summary of the SPF check

Does a valid SPF record exist?
An SPF record was found for the domain eon.de.
The SPF record for eon.de is valid.
The syntax check of the SPF record shows no obvious errors.

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, 79 IP address(es) were authorized by the SPF record to send emails.

The SPF record analysis was performed on 28.03.2024 at 14:29:47 clock.

Lookup for the domain:
eon.de
IP address to be checked:
no IP address specified
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Evaluation for the domain eon.de 

Nameserverset:
ns0009.secondary.cloudflare.com
ns0166.secondary.cloudflare.com
Determined SPF record:
Legitimated IP addresses:
IP Provider / ASN DNSBL-Check
40.92.0.0/15
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
40.107.0.0/16
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.100.0.0/14
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
104.47.0.0/17
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f400::/48
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403::/49
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403:8000::/51
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403:c000::/51
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
2a01:111:f403:f000::/52
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
87.253.232.0/21
Mailjet SAS blacklist 
185.189.236.0/22
Mailjet SAS blacklist 
185.211.120.0/22
Mailjet SAS blacklist 
185.250.236.0/22
Mailjet SAS blacklist 
213.52.186.141/32
Equinix (EMEA) Acquisition Enterprises B.V. blacklist 
213.52.186.142/32
Equinix (EMEA) Acquisition Enterprises B.V. blacklist 
35.214.208.81/32
GOOGLE blacklist 
35.214.213.218/32
GOOGLE blacklist 
35.214.183.81/32
GOOGLE blacklist 
35.214.212.238/32
GOOGLE blacklist 
130.214.193.83/32
SAP SE blacklist 
130.214.193.93/32
SAP SE blacklist 
130.214.193.78/32
SAP SE blacklist 
130.214.193.85/32
SAP SE blacklist 
130.214.156.205/32
SAP SE blacklist 
130.214.156.249/32
SAP SE blacklist 
155.56.221.13/32
SAP SE blacklist 
155.56.221.14/32
SAP SE blacklist 
155.56.220.141/32
SAP SE blacklist 
155.56.220.142/32
SAP SE blacklist 
155.56.221.15/32
SAP SE blacklist 
155.56.221.16/32
SAP SE blacklist 
155.56.222.26/32
SAP SE blacklist 
155.56.222.27/32
SAP SE blacklist 
98.97.250.0/24
AMAZON-02 blacklist 
18.244.18.118 AMAZON-02 blacklist 
18.244.18.107 AMAZON-02 blacklist 
18.244.18.42 AMAZON-02 blacklist 
18.244.18.6 AMAZON-02 blacklist 
153.100.8.31 E.ON Verwaltungs GmbH blacklist 
153.100.8.32 E.ON Verwaltungs GmbH blacklist 
50.31.39.92 SENDGRID blacklist 
77.93.136.104/30
GCI Network Solutions Limited blacklist 
80.237.138.228 Host Europe GmbH blacklist 
80.77.214.32/27
Kyndryl Deutschland Aviation Industry Services GmbH blacklist 
81.169.146.164 Strato AG blacklist 
81.27.166.251 R-KOM Regensburger Telekommunikationsgesellschaft mbH blacklist 
83.166.168.42/31
Node4 Limited blacklist 
83.169.34.84 Host Europe GmbH blacklist 
84.45.11.112/29
CloudCoCo Connect Limited blacklist 
85.115.56.190 Forcepoint Cloud Ltd blacklist 
85.115.58.190 Forcepoint Cloud Ltd blacklist 
85.222.130.224/28
SALESFORCE blacklist 
85.222.138.224/28
SALESFORCE blacklist 
87.119.211.0/27
PlusServer GmbH blacklist 
88.51.233.60 Telecom Italia blacklist 
93.174.143.68 Node4 Limited blacklist 
93.94.85.206 myLoc managed IT AG blacklist 
95.130.250.122 dogado GmbH blacklist 
96.43.144.0/21
SALESFORCE blacklist 
94.100.245.28/31
T-Systems International GmbH blacklist 
185.8.11.185 ScaleUp Technologies GmbH & Co. KG blacklist 
192.109.216.0/24
- blacklist 
160.44.230.240/29
T-Systems International GmbH blacklist 
148.105.8.0/21
THEROCKETSCIENCEGROUP blacklist 
198.2.128.0/18
THEROCKETSCIENCEGROUP blacklist 
205.201.128.0/20
THEROCKETSCIENCEGROUP blacklist 
136.146.128.64/28
SALESFORCE blacklist 
162.247.216.0/22
QUALTRICS-01 blacklist 
178.21.131.158 Webhuset AS blacklist 
178.249.98.17 LIVEPERSON blacklist 
182.50.78.64/28
SALESFORCE blacklist 
212.18.21.68/31
M-net Telekommunikations GmbH blacklist 
216.74.162.12/30
CENTURYLINK-LEGACY-SAVVIS blacklist 
46.249.197.144/30
Pulsant (Scotland) Ltd blacklist 
46.30.5.108/30
Uptime IT GmbH blacklist 
5.61.115.0/25
E-Search DAC blacklist 
50.31.33.37 SENDGRID blacklist 
193.26.32.0/19
- blacklist 
94.100.245.16/28
T-Systems International GmbH blacklist 
SPF-Syntax Check:
Analysis result of the SPF record for the domain: eon.de

SPF record available?

We found an SPF record for the domain.

v=spf1

Additionally authorized A-records?

In addition to the A-records stored in the DNS, we were able to find further records authorized in the SPF-record

18.244.18.118
18.244.18.107
18.244.18.42
18.244.18.6

Additionally authorized IPv4 addresses

Explicit IPv4 addresses in the SPF record have been authorized to send

192.109.216.0/24
160.44.230.240/29
148.105.8.0/21
198.2.128.0/18
205.201.128.0/20
136.146.128.64/28
162.247.216.0/22
178.21.131.158
178.249.98.17
182.50.78.64/28
212.18.21.68/31
216.74.162.12/30
46.249.197.144/30
46.30.5.108/30
5.61.115.0/25
50.31.33.37
193.26.32.0/19
94.100.245.16/28

Additional external SPF records

We could find other records authorized in the SPF record

include:spf.protection.outlook.com
v=spf1 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:52.100.0.0/14 ip4:104.47.0.0/17 ip6:2a01:111:f400::/48 ip6:2a01:111:f403::/49 ip6:2a01:111:f403:8000::/51 ip6:2a01:111:f403:c000::/51 ip6:2a01:111:f403:f000::/52 -all
ipv4:
40.92.0.0/15
ipv4:
40.107.0.0/16
ipv4:
52.100.0.0/14
ipv4:
104.47.0.0/17
ipv6:
2a01:111:f400::/48
ipv6:
2a01:111:f403::/49
ipv6:
2a01:111:f403:8000::/51
ipv6:
2a01:111:f403:c000::/51
ipv6:
2a01:111:f403:f000::/52
include:spf.mailjet.com
v=spf1 ip4:87.253.232.0/21 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22 ~all
ipv4:
87.253.232.0/21
ipv4:
185.189.236.0/22
ipv4:
185.211.120.0/22
ipv4:
185.250.236.0/22
include:spf-sap.eon.com
v=spf1 ip4:213.52.186.141/32 ip4:213.52.186.142/32 ip4:35.214.208.81/32 ip4:35.214.213.218/32 ip4:35.214.183.81/32 ip4:35.214.212.238/32 ip4:130.214.193.83/32 ip4:130.214.193.93/32 ip4:130.214.193.78/32 ip4:130.214.193.85/32 ip4:130.214.156.205/32 ip4:130.214.156.249/32 ip4:155.56.221.13/32 ip4:155.56.221.14/32 ip4:155.56.220.141/32 ip4:155.56.220.142/32 ip4:155.56.221.15/32 ip4:155.56.221.16/32 ip4:155.56.222.26/32 ip4:155.56.222.27/32 ip4:98.97.250.0/24 -all
ipv4:
213.52.186.141/32
ipv4:
213.52.186.142/32
ipv4:
35.214.208.81/32
ipv4:
35.214.213.218/32
ipv4:
35.214.183.81/32
ipv4:
35.214.212.238/32
ipv4:
130.214.193.83/32
ipv4:
130.214.193.93/32
ipv4:
130.214.193.78/32
ipv4:
130.214.193.85/32
ipv4:
130.214.156.205/32
ipv4:
130.214.156.249/32
ipv4:
155.56.221.13/32
ipv4:
155.56.221.14/32
ipv4:
155.56.220.141/32
ipv4:
155.56.220.142/32
ipv4:
155.56.221.15/32
ipv4:
155.56.221.16/32
ipv4:
155.56.222.26/32
ipv4:
155.56.222.27/32
ipv4:
98.97.250.0/24
include:spfa.eon.de
v=spf1 ip4:153.100.8.31 ip4:153.100.8.32 ip4:50.31.39.92 ip4:77.93.136.104/30 ip4:80.237.138.228 ip4:80.77.214.32/27 ip4:81.169.146.164 ip4:81.27.166.251 ip4:83.166.168.42/31 ip4:83.169.34.84 ip4:84.45.11.112/29 ip4:85.115.56.190 ip4:85.115.58.190 ip4:85.222.130.224/28 ip4:85.222.138.224/28 ip4:87.119.211.0/27 ip4:88.51.233.60 ip4:93.174.143.68 ip4:93.94.85.206 ip4:95.130.250.122 ip4:96.43.144.0/21 ip4:94.100.245.28/31 ip4:185.8.11.185 -all
ipv4:
153.100.8.31
ipv4:
153.100.8.32
ipv4:
50.31.39.92
ipv4:
77.93.136.104/30
ipv4:
80.237.138.228
ipv4:
80.77.214.32/27
ipv4:
81.169.146.164
ipv4:
81.27.166.251
ipv4:
83.166.168.42/31
ipv4:
83.169.34.84
ipv4:
84.45.11.112/29
ipv4:
85.115.56.190
ipv4:
85.115.58.190
ipv4:
85.222.130.224/28
ipv4:
85.222.138.224/28
ipv4:
87.119.211.0/27
ipv4:
88.51.233.60
ipv4:
93.174.143.68
ipv4:
93.94.85.206
ipv4:
95.130.250.122
ipv4:
96.43.144.0/21
ipv4:
94.100.245.28/31
ipv4:
185.8.11.185
include:_spf.salesforce.com
v=spf1 exists:%{i}._spf.mta.salesforce.com -all

E-Mail handling

How should the checkHost() function of the e-mail server handle the e-mail? (syntax )

-all
Fail (non-compliant e-mails are rejected)

Will be forwarded to another SPF record?

There is no reference to any other SPF record

Are the server addresses allowed to send e-mails?

In the SPF entry the mechanism 'a' has not been set.

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 IPv6 addresses

No explicit IPv6 addresses in the SPF record have been authorised to send

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 )

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.

Recently performed SPF lookups

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:

104.18.37.203

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