Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cos.edu
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-30 03:03:45 UTC · ↺ Refresh
MX Hostnames
- cos-edu.mail.protection.outlook.com
MX Priorities
- cos-edu.mail.protection.outlook.com: 0
A / AAAA Records
- 44.239.165.161 ↩ ec2-44-239-165-161.us-west-2.compute.amazonaws.com
- 44.224.66.2 ↩ ec2-44-224-66-2.us-west-2.compute.amazonaws.com
Mail Server IPs
- 52.101.41.4 ↩ mail-sj2pr05cu00204.inbound.protection.outlook.com
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 52.101.8.51 ↩ mail-dm1pr04cu00203.inbound.protection.outlook.com
- 52.101.40.4 ↩ mail-cy5pr03cu00204.inbound.protection.outlook.com
- 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
- 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
- 2a01:111:f403:f912:: ↩ mail-cy5pr03cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-388.awsdns-48.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-388.awsdns-48.com
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-913.awsdns-50.net
ns-1303.awsdns-34.org
ns-1541.awsdns-00.co.uk
ns-388.awsdns-48.com
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.cos.edu include:spf.protection.outlook.com include:_regroup.cos.edu include:spf_.watermarkinsights.com include:_spf.meltwater.com include:mail.zendesk.com include:_spf_useast2.prod.hydra.sophos.com include:_spf.google.com ip4:208.75.120.0/22 ip4:205.207.104.0/22 ip4:216.17.150.251 ip4:216.17.150.242 ip4:208.74.204.9 ip4:35.80.141.6 ip4:44.229.121.55 :ip4:148.59.100.16/28 -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;fo=1;pct=90;aspf=r;adkim=r;rua=mailto:[email protected];ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
⚠ Policy applies to 90% of failing messages only
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
16 records- google-site-verification=SngOPqEFcfmxuf5goWl9kYPv9PIw6X-8vv8SgLzCCGE
- docker-verification=5eb79710-963a-472e-b78a-d9695d074f2e
- ReleaseWLIDNamespace=true
- canva-site-verification=L_pDLxxKmkQEj5-lRXqEPA
- atlassian-domain-verification=bcr58zw0ania83uJQZQF8an3dyDKWT7BnAhgCUvlvfI6iTeZJr4It2E2xcUZ9dg8
- AS2TrustedDomains=*.cos.edu
- workplace-domain-verification=5dmOB6Xvgjz4jlViHRLdOzNoAMdxEN
- apple-domain-verification=c6WjCApXrC8HP5i1
- adobe-idp-site-verification=8b4585b9cb588a5dca47d1c22bbd59bb93e21b2c029e5901a7cb43da3d32c858
- google-site-verification=meUTxRFVGeA7yW60wSNatPOd4lMJr5NaZMSY5UwNUjg
- sophos-domain-verification=227fea0d5195d7a93036aa3f742ed1ef5717b79bcf5e50104eb5746bf6adfb0b
- ZOOM_verify_qDhGRuGM5nYDNjQ8UuoFVC
- abuseipdb-verification=jXh5oDgB
- SPFv=spf1 include:_spf.cos.edu include:spf.protection.outlook.com include:_regroup.cos.edu include:spf_.watermarkinsights.com include:_spf.meltwater.com include:mail.zendesk.com include:_spf_useast2.prod.hydra.sophos.com include:_spf.google.com ip4:208.75.120.0/22 ip4:205.207.104.0/22 ip4:216.17.150.251 ip4:216.17.150.242 ip4:208.74.204.9 ip4:35.80.141.6 ip4:44.229.121.55 :ip4:148.59.100.16/28 -all
- have-i-been-pwned-verification=997024459a6ba852f26f3e2c193a9d44
- MS=ms40793896
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