SPF Check:
tsc.education

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.

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 tsc.education.
The SPF record for tsc.education 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, 91 IP address(es) were authorized by the SPF record to send emails.

The SPF record analysis was performed on 25.12.2024 at 03:24:03 clock.

Lookup for the domain:
tsc.education
IP address to be checked:
no IP address specified
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Evaluation for the domain tsc.education 

Nameserverset:
ns2.534.cluster-nbg1.de
ns1.534.cluster-nbg1.de
Determined SPF record:
 SPF Send
Legitimated IP addresses:
IP Provider / ASN DNSBL-Check
34.69.117.62 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.12 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.140 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.147 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.20 GOOGLE-CLOUD-PLATFORM blacklist 
35.208.244.18 GOOGLE blacklist 
185.56.84.7 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.14 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.25 GOOGLE-CLOUD-PLATFORM blacklist 
35.209.67.207 GOOGLE blacklist 
185.56.84.15 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.8 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.16 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.131 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.148 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.141 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.134 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.13 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.143 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.144 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.159 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.157 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.154 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.6 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.17 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.133 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.153 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.3 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.27 GOOGLE-CLOUD-PLATFORM blacklist 
35.238.96.225 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.9 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.158 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.31 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.137 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.2 GOOGLE-CLOUD-PLATFORM blacklist 
35.192.135.139 GOOGLE-CLOUD-PLATFORM blacklist 
35.223.167.9 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.30 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.29 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.151 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.28 GOOGLE-CLOUD-PLATFORM blacklist 
35.225.161.143 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.149 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.132 GOOGLE-CLOUD-PLATFORM blacklist 
104.197.42.21 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.145 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.150 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.19 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.152 GOOGLE-CLOUD-PLATFORM blacklist 
35.206.120.11 GOOGLE blacklist 
35.206.105.37 GOOGLE blacklist 
35.208.121.216 GOOGLE blacklist 
185.56.84.4 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.156 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.142 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.26 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.23 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.32 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.21 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.24 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.129 GOOGLE-CLOUD-PLATFORM blacklist 
35.208.10.124 GOOGLE blacklist 
185.56.85.155 GOOGLE-CLOUD-PLATFORM blacklist 
35.192.5.156 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.139 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.135 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.146 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.11 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.5 GOOGLE-CLOUD-PLATFORM blacklist 
35.224.11.180 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.22 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.130 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.138 GOOGLE-CLOUD-PLATFORM blacklist 
34.70.37.227 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.18 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.85.136 GOOGLE-CLOUD-PLATFORM blacklist 
185.56.84.10 GOOGLE-CLOUD-PLATFORM blacklist 
3.123.158.231 AMAZON-02 blacklist 
3.124.45.121 AMAZON-02 blacklist 
83.171.238.189 Droptop GmbH blacklist 
40.92.0.0/15
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
40.107.0.0/16
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.100.0.0/15
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.102.0.0/16
MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.103.0.0/17
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 
SPF-Syntax Check:
Analysis result of the SPF record for the domain: tsc.education

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

34.69.117.62
185.56.84.12
185.56.85.140
185.56.85.147
185.56.84.20
35.208.244.18
185.56.84.7
185.56.84.14
185.56.84.25
35.209.67.207
185.56.84.15
185.56.84.8
185.56.84.16
185.56.85.131
185.56.85.148
185.56.85.141
185.56.85.134
185.56.84.13
185.56.85.143
185.56.85.144
185.56.85.159
185.56.85.157
185.56.85.154
185.56.84.6
185.56.84.17
185.56.85.133
185.56.85.153
185.56.84.3
185.56.84.27
35.238.96.225
185.56.84.9
185.56.85.158
185.56.84.31
185.56.85.137
185.56.84.2
35.192.135.139
35.223.167.9
185.56.84.30
185.56.84.29
185.56.85.151
185.56.84.28
35.225.161.143
185.56.85.149
185.56.85.132
104.197.42.21
185.56.85.145
185.56.85.150
185.56.84.19
185.56.85.152
35.206.120.11
35.206.105.37
35.208.121.216
185.56.84.4
185.56.85.156
185.56.85.142
185.56.84.26
185.56.84.23
185.56.84.32
185.56.84.21
185.56.84.24
185.56.85.129
35.208.10.124
185.56.85.155
35.192.5.156
185.56.85.139
185.56.85.135
185.56.85.146
185.56.84.11
185.56.84.5
35.224.11.180
185.56.84.22
185.56.85.130
185.56.85.138
34.70.37.227
185.56.84.18
185.56.85.136
185.56.84.10

Additionally authorized IPv4 addresses

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

3.123.158.231
3.124.45.121
83.171.238.189

Additional external SPF records

We could find other records authorized in the SPF record

➥
include:_spf.salesforce.com
v=spf1 exists:%{i}._spf.mta.salesforce.com -all
➥
include:spf.protection.outlook.com
v=spf1 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:52.100.0.0/15 ip4:52.102.0.0/16 ip4:52.103.0.0/17 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:
52.100.0.0/15
ipv4:
52.102.0.0/16
ipv4:
52.103.0.0/17
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

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)

Unknown mechanisms

Unknown mechanisms were found in the SPF record



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

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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:

534.cluster-nbg1.de

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