SPF Check:
merrimack.edu

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 merrimack.edu.
The SPF record for merrimack.edu 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, 148 IP address(es) were authorized by the SPF record to send emails.

The SPF record analysis was performed on 24.12.2024 at 17:05:26 clock.

Lookup for the domain:
merrimack.edu
IP address to be checked:
no IP address specified
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Evaluation for the domain merrimack.edu 

Nameserverset:
ns4.comcastbusiness.net
ns1.comcastbusiness.net
ns2.comcastbusiness.net
ns3.comcastbusiness.net
ns5.comcastbusiness.net
Determined SPF record:
Legitimated IP addresses:
IP Provider / ASN DNSBL-Check
64.80.225.3 WINDSTREAM blacklist 
74.125.148.0/22
GOOGLE blacklist 
34.194.230.233 AMAZON-AES blacklist 
34.230.107.215 AMAZON-AES blacklist 
50.220.237.3 COMCAST-7015 blacklist 
176.31.145.254 OVH SAS blacklist 
52.210.155.131 AMAZON-02 blacklist 
34.250.117.27 AMAZON-02 blacklist 
52.62.198.211 AMAZON-02 blacklist 
52.60.116.9 AMAZON-02 blacklist 
52.60.157.49 AMAZON-02 blacklist 
150.230.240.226 ORACLE-BMC-31898 blacklist 
52.70.104.58 AMAZON-AES blacklist 
35.174.117.211 AMAZON-AES blacklist 
168.245.29.173 SENDGRID blacklist 
52.86.177.169 AMAZON-AES blacklist 
208.91.114.151 FORTINET blacklist 
38.106.32.46/32
IVAS01 blacklist 
209.85.220.41 GOOGLE blacklist 
209.85.220.69 GOOGLE blacklist 
72.11.151.0/24
ASN-QUADRANET-GLOBAL blacklist 
155.94.211.149 HostSlim B.V. blacklist 
72.11.157.141 HostSlim B.V. blacklist 
72.11.157.197 HostSlim B.V. blacklist 
167.89.90.160 SENDGRID blacklist 
149.233.12.225 NTT Global Data Centers EMEA GmbH blacklist 
149.233.18.225 NTT Global Data Centers EMEA GmbH blacklist 
38.114.109.31 NAVEX-IT-HOSTING blacklist 
38.114.109.78 NAVEX-IT-HOSTING blacklist 
38.134.235.31 COGENT-174 blacklist 
38.134.235.78 COGENT-174 blacklist 
208.76.56.0/21
- blacklist 
216.146.32.0/20
ORACLE-BMC-31898 blacklist 
80.231.25.0/24
AS6453 blacklist 
80.231.219.0/24
AS6453 blacklist 
103.11.200.0/22
- blacklist 
199.19.0.0/21
- blacklist 
204.13.248.0/22
- blacklist 
208.78.68.0/22
ORACLE-BMC-31898 blacklist 
162.88.36.0/23
ORACLE-BMC-31898 blacklist 
162.88.4.0/23
ORACLE-BMC-31898 blacklist 
162.88.24.0/24
ORACLE-BMC-31898 blacklist 
162.88.28.0/24
- blacklist 
10.144.155.128/26
- - blacklist 
129.148.164.0/25
ORACLE-BMC-31898 blacklist 
129.148.215.0/25
ORACLE-BMC-31898 blacklist 
129.149.6.0/25
ORACLE-BMC-31898 blacklist 
129.149.38.0/25
ORACLE-BMC-31898 blacklist 
138.1.170.0/24
ORACLE-BMC-31898 blacklist 
147.154.32.0/25
ORACLE-BMC-31898 blacklist 
147.154.63.0/24
ORACLE-BMC-31898 blacklist 
147.154.126.0/24
ORACLE-BMC-31898 blacklist 
147.154.191.0/24
ORACLE-BMC-31898 blacklist 
162.88.24.0/21
ORACLE-BMC-31898 blacklist 
192.29.72.0/25
ORACLE-BMC-31898 blacklist 
192.29.88.0/25
ORACLE-BMC-31898 blacklist 
192.29.103.128/25
ORACLE-BMC-31898 blacklist 
192.29.134.0/25
ORACLE-BMC-31898 blacklist 
155.248.148.0/25
ORACLE-BMC-31898 blacklist 
131.186.12.0/25
ORACLE-BMC-31898 blacklist 
138.1.156.112 ORACLE-BMC-31898 blacklist 
130.35.132.195 ORACLE-BMC-31898 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 
54.240.64.0/19
AMAZON-AES blacklist 
54.240.96.0/19
AMAZON-02 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 
162.247.216.0/22
QUALTRICS-01 blacklist 
139.60.152.0/22
QUALTRICS-01 blacklist 
98.97.248.0/21
AMAZON-02 blacklist 
64.69.212.0/24
AMAZON-02 blacklist 
54.186.193.102/32
AMAZON-02 blacklist 
52.222.73.120/32
Amazon Data Services Ireland Ltd blacklist 
52.222.73.83 Amazon Data Services Ireland Ltd blacklist 
52.222.62.51 Amazon Data Services Ireland Ltd blacklist 
52.222.75.85 Amazon Data Services Ireland Ltd blacklist 
52.222.89.228 Amazon Data Services Ireland Ltd blacklist 
160.1.62.192 Amazon Data Services Ireland Ltd blacklist 
52.61.91.9 Amazon Data Services Ireland Ltd blacklist 
15.200.21.50 Amazon Data Services Ireland Ltd blacklist 
15.200.201.185 Amazon Data Services Ireland Ltd blacklist 
15.200.44.248 Amazon Data Services Ireland Ltd blacklist 
104.45.175.206 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.224.142.128 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
52.180.90.234 MICROSOFT-CORP-MSN-AS-BLOCK blacklist 
208.117.61.155 SENDGRID blacklist 
139.60.0.0/24
AMAZON-AES blacklist 
139.60.1.0/24
AMAZON-AES blacklist 
139.60.2.0/24
AMAZON-02 blacklist 
139.60.3.0/24
AMAZON-AES blacklist 
35.190.247.0/24
GOOGLE-CLOUD-PLATFORM blacklist 
64.233.160.0/19
GOOGLE blacklist 
66.102.0.0/20
GOOGLE blacklist 
66.249.80.0/20
GOOGLE blacklist 
72.14.192.0/18
GOOGLE blacklist 
74.125.0.0/16
GOOGLE blacklist 
108.177.8.0/21
GOOGLE blacklist 
173.194.0.0/16
GOOGLE blacklist 
209.85.128.0/17
GOOGLE blacklist 
216.58.192.0/19
GOOGLE blacklist 
216.239.32.0/19
GOOGLE blacklist 
2001:4860:4000::/36
GOOGLE blacklist 
2404:6800:4000::/36
GOOGLE blacklist 
2607:f8b0:4000::/36
GOOGLE blacklist 
2800:3f0:4000::/36
GOOGLE blacklist 
2a00:1450:4000::/36
GOOGLE blacklist 
2c0f:fb50:4000::/36
GOOGLE blacklist 
172.217.0.0/19
GOOGLE blacklist 
172.217.32.0/20
GOOGLE blacklist 
172.217.128.0/19
GOOGLE blacklist 
172.217.160.0/20
GOOGLE blacklist 
172.217.192.0/19
GOOGLE blacklist 
172.253.56.0/21
GOOGLE blacklist 
172.253.112.0/20
GOOGLE blacklist 
108.177.96.0/19
GOOGLE blacklist 
35.191.0.0/16
GOOGLE blacklist 
130.211.0.0/22
GOOGLE-CLOUD-PLATFORM blacklist 
152.160.0.0/16
123NET blacklist 
23.251.253.0/26
AMAZON-AES blacklist 
38.153.9.0/24
24SHELLS blacklist 
38.152.248.0/24
24SHELLS blacklist 
212.47.85.0/24
SERVER-MANIA blacklist 
3.93.157.0/24
AMAZON-AES blacklist 
3.210.190.0/24
AMAZON-AES blacklist 
18.208.124.128/25
AMAZON-AES blacklist 
54.174.52.0/24
AMAZON-AES blacklist 
54.174.57.0/24
AMAZON-AES blacklist 
54.174.59.0/24
AMAZON-AES blacklist 
54.174.60.0/23
AMAZON-AES blacklist 
54.174.63.0/24
AMAZON-AES blacklist 
108.179.144.0/20
AMAZON-02 blacklist 
139.180.17.0/24
AMAZON-AES blacklist 
141.193.184.32/27
AMAZON-AES blacklist 
141.193.184.64/26
AMAZON-AES blacklist 
141.193.184.128/25
AMAZON-AES blacklist 
141.193.185.32/27
AMAZON-02 blacklist 
141.193.185.64/26
AMAZON-02 blacklist 
141.193.185.128/25
AMAZON-02 blacklist 
143.244.80.0/20
AMAZON-AES blacklist 
158.247.16.0/20
AMAZON-AES blacklist 
216.139.64.0/19
AMAZON-02 blacklist 
SPF-Syntax Check:
Analysis result of the SPF record for the domain: merrimack.edu

SPF record available?

We found an SPF record for the domain.

v=spf1

Additional external SPF records

We could find other records authorized in the SPF record

include:_spf.merrimack_edu._d.easydmarc.pro
v=spf1 ip4:64.80.225.3 ip4:74.125.148.0/22 ip4:34.194.230.233 ip4:34.230.107.215 ip4:50.220.237.3 ip4:176.31.145.254 ip4:52.210.155.131 ip4:34.250.117.27 ip4:52.62.198.211 ip4:52.60.116.9 ip4:52.60.157.49 ip4:150.230.240.226 ip4:52.70.104.58 ip4:35.174.117.211 ip4:168.245.29.173 ip4:52.86.177.169 ip4:208.91.114.151 ip4:38.106.32.46/32 ip4:209.85.220.41 ip4:209.85.220.69 ip4:72.11.151.0/24 ip4:155.94.211.149 ip4:72.11.157.141 ip4:72.11.157.197 ip4:167.89.90.160 ip4:149.233.12.225 ip4:149.233.18.225 ip4:38.114.109.31 ip4:38.114.109.78 ip4:38.134.235.31 ip4:38.134.235.78 ip4:208.76.56.0/21 ip4:216.146.32.0/20 ip4:80.231.25.0/24 ip4:80.231.219.0/24 ip4:103.11.200.0/22 ip4:199.19.0.0/21 ip4:204.13.248.0/22 ip4:208.78.68.0/22 ip4:162.88.36.0/23 ip4:162.88.4.0/23 ip4:162.88.24.0/24 ip4:162.88.28.0/24 ip4:10.144.155.128/26 ip4:129.148.164.0/25 include:_spf1.merrimack_edu._d.easydmarc.pro ~all
ipv4:
64.80.225.3
ipv4:
74.125.148.0/22
ipv4:
34.194.230.233
ipv4:
34.230.107.215
ipv4:
50.220.237.3
ipv4:
176.31.145.254
ipv4:
52.210.155.131
ipv4:
34.250.117.27
ipv4:
52.62.198.211
ipv4:
52.60.116.9
ipv4:
52.60.157.49
ipv4:
150.230.240.226
ipv4:
52.70.104.58
ipv4:
35.174.117.211
ipv4:
168.245.29.173
ipv4:
52.86.177.169
ipv4:
208.91.114.151
ipv4:
38.106.32.46/32
ipv4:
209.85.220.41
ipv4:
209.85.220.69
ipv4:
72.11.151.0/24
ipv4:
155.94.211.149
ipv4:
72.11.157.141
ipv4:
72.11.157.197
ipv4:
167.89.90.160
ipv4:
149.233.12.225
ipv4:
149.233.18.225
ipv4:
38.114.109.31
ipv4:
38.114.109.78
ipv4:
38.134.235.31
ipv4:
38.134.235.78
ipv4:
208.76.56.0/21
ipv4:
216.146.32.0/20
ipv4:
80.231.25.0/24
ipv4:
80.231.219.0/24
ipv4:
103.11.200.0/22
ipv4:
199.19.0.0/21
ipv4:
204.13.248.0/22
ipv4:
208.78.68.0/22
ipv4:
162.88.36.0/23
ipv4:
162.88.4.0/23
ipv4:
162.88.24.0/24
ipv4:
162.88.28.0/24
ipv4:
10.144.155.128/26
ipv4:
129.148.164.0/25
include:_spf1.merrimack_edu._d.easydmarc.pro
v=spf1 ip4:129.148.215.0/25 ip4:129.149.6.0/25 ip4:129.149.38.0/25 ip4:138.1.170.0/24 ip4:147.154.32.0/25 ip4:147.154.63.0/24 ip4:147.154.126.0/24 ip4:147.154.191.0/24 ip4:162.88.24.0/21 ip4:192.29.72.0/25 ip4:192.29.88.0/25 ip4:192.29.103.128/25 ip4:192.29.134.0/25 ip4:155.248.148.0/25 ip4:131.186.12.0/25 ip4:138.1.156.112 ip4:130.35.132.195 ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/19 ip4:54.240.96.0/19 ip4:76.223.128.0/19 ip4:216.221.160.0/19 ip4:206.55.144.0/20 ip4:162.247.216.0/22 ip4:139.60.152.0/22 ip4:98.97.248.0/21 ip4:64.69.212.0/24 ip4:54.186.193.102/32 ip4:52.222.73.120/32 ip4:52.222.73.83 ip4:52.222.62.51 ip4:52.222.75.85 ip4:52.222.89.228 ip4:160.1.62.192 ip4:52.61.91.9 ip4:15.200.21.50 ip4:15.200.201.185 include:_spf2.merrimack_edu._d.easydmarc.pro ~all
ipv4:
129.148.215.0/25
ipv4:
129.149.6.0/25
ipv4:
129.149.38.0/25
ipv4:
138.1.170.0/24
ipv4:
147.154.32.0/25
ipv4:
147.154.63.0/24
ipv4:
147.154.126.0/24
ipv4:
147.154.191.0/24
ipv4:
162.88.24.0/21
ipv4:
192.29.72.0/25
ipv4:
192.29.88.0/25
ipv4:
192.29.103.128/25
ipv4:
192.29.134.0/25
ipv4:
155.248.148.0/25
ipv4:
131.186.12.0/25
ipv4:
138.1.156.112
ipv4:
130.35.132.195
ipv4:
199.255.192.0/22
ipv4:
199.127.232.0/22
ipv4:
54.240.0.0/18
ipv4:
69.169.224.0/20
ipv4:
23.249.208.0/20
ipv4:
23.251.224.0/19
ipv4:
76.223.176.0/20
ipv4:
54.240.64.0/19
ipv4:
54.240.96.0/19
ipv4:
76.223.128.0/19
ipv4:
216.221.160.0/19
ipv4:
206.55.144.0/20
ipv4:
162.247.216.0/22
ipv4:
139.60.152.0/22
ipv4:
98.97.248.0/21
ipv4:
64.69.212.0/24
ipv4:
54.186.193.102/32
ipv4:
52.222.73.120/32
ipv4:
52.222.73.83
ipv4:
52.222.62.51
ipv4:
52.222.75.85
ipv4:
52.222.89.228
ipv4:
160.1.62.192
ipv4:
52.61.91.9
ipv4:
15.200.21.50
ipv4:
15.200.201.185
include:_spf2.merrimack_edu._d.easydmarc.pro
v=spf1 ip4:15.200.44.248 exists:%{i}._spf.elasticemail.info ip4:104.45.175.206 ip4:52.224.142.128 ip4:52.180.90.234 ip4:208.117.61.155 ip4:139.60.0.0/24 ip4:139.60.1.0/24 ip4:139.60.2.0/24 ip4:139.60.3.0/24 ip4:35.190.247.0/24 ip4:64.233.160.0/19 ip4:66.102.0.0/20 ip4:66.249.80.0/20 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 ip6:2001:4860:4000::/36 ip6:2404:6800:4000::/36 ip6:2607:f8b0:4000::/36 ip6:2800:3f0:4000::/36 ip6:2a00:1450:4000::/36 ip6:2c0f:fb50:4000::/36 ip4:172.217.0.0/19 ip4:172.217.32.0/20 ip4:172.217.128.0/19 ip4:172.217.160.0/20 ip4:172.217.192.0/19 ip4:172.253.56.0/21 ip4:172.253.112.0/20 ip4:108.177.96.0/19 ip4:35.191.0.0/16 ip4:130.211.0.0/22 ip4:152.160.0.0/16 ip4:23.251.253.0/26 ip4:38.153.9.0/24 ip4:38.152.248.0/24 include:_spf3.merrimack_edu._d.easydmarc.pro ~all
ipv4:
15.200.44.248
ipv4:
104.45.175.206
ipv4:
52.224.142.128
ipv4:
52.180.90.234
ipv4:
208.117.61.155
ipv4:
139.60.0.0/24
ipv4:
139.60.1.0/24
ipv4:
139.60.2.0/24
ipv4:
139.60.3.0/24
ipv4:
35.190.247.0/24
ipv4:
64.233.160.0/19
ipv4:
66.102.0.0/20
ipv4:
66.249.80.0/20
ipv4:
72.14.192.0/18
ipv4:
74.125.0.0/16
ipv4:
108.177.8.0/21
ipv4:
173.194.0.0/16
ipv4:
209.85.128.0/17
ipv4:
216.58.192.0/19
ipv4:
216.239.32.0/19
ipv4:
172.217.0.0/19
ipv4:
172.217.32.0/20
ipv4:
172.217.128.0/19
ipv4:
172.217.160.0/20
ipv4:
172.217.192.0/19
ipv4:
172.253.56.0/21
ipv4:
172.253.112.0/20
ipv4:
108.177.96.0/19
ipv4:
35.191.0.0/16
ipv4:
130.211.0.0/22
ipv4:
152.160.0.0/16
ipv4:
23.251.253.0/26
ipv4:
38.153.9.0/24
ipv4:
38.152.248.0/24
ipv6:
2001:4860:4000::/36
ipv6:
2404:6800:4000::/36
ipv6:
2607:f8b0:4000::/36
ipv6:
2800:3f0:4000::/36
ipv6:
2a00:1450:4000::/36
ipv6:
2c0f:fb50:4000::/36
include:_spf3.merrimack_edu._d.easydmarc.pro
v=spf1 ip4:212.47.85.0/24 ip4:3.93.157.0/24 ip4:3.210.190.0/24 ip4:18.208.124.128/25 ip4:54.174.52.0/24 ip4:54.174.57.0/24 ip4:54.174.59.0/24 ip4:54.174.60.0/23 ip4:54.174.63.0/24 ip4:108.179.144.0/20 ip4:139.180.17.0/24 ip4:141.193.184.32/27 ip4:141.193.184.64/26 ip4:141.193.184.128/25 ip4:141.193.185.32/27 ip4:141.193.185.64/26 ip4:141.193.185.128/25 ip4:143.244.80.0/20 ip4:158.247.16.0/20 ip4:216.139.64.0/19 ~all
ipv4:
212.47.85.0/24
ipv4:
3.93.157.0/24
ipv4:
3.210.190.0/24
ipv4:
18.208.124.128/25
ipv4:
54.174.52.0/24
ipv4:
54.174.57.0/24
ipv4:
54.174.59.0/24
ipv4:
54.174.60.0/23
ipv4:
54.174.63.0/24
ipv4:
108.179.144.0/20
ipv4:
139.180.17.0/24
ipv4:
141.193.184.32/27
ipv4:
141.193.184.64/26
ipv4:
141.193.184.128/25
ipv4:
141.193.185.32/27
ipv4:
141.193.185.64/26
ipv4:
141.193.185.128/25
ipv4:
143.244.80.0/20
ipv4:
158.247.16.0/20
ipv4:
216.139.64.0/19

E-Mail handling

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

~all
SoftFail (non-compliant e-mails are accepted but marked)

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.

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

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:

141.193.213.20

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