Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
serco.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 01:04:27 UTC · ↺ Refresh
MX Hostnames
- serco-com.mail.protection.outlook.com
MX Priorities
- serco-com.mail.protection.outlook.com: 5
A / AAAA Records
- 4.234.53.209 (no PTR)
Mail Server IPs
- 40.93.192.1 ↩ mail-dm5pr02cu00201.inbound.protection.outlook.com
- 52.101.40.4 ↩ mail-cy5pr03cu00204.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
- 2a01:111:f403:f901:: ↩ mail-mn2pr04cu00200.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-04.azure-dns.com azuredns-hostmaster.microsoft.com 1 3600 300 2419200 300
Primary NS (mname)
ns1-04.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
3600s
Retry
300s
Expire
2419200s
Minimum TTL
300s
Nameservers (NS)
ns2-04.azure-dns.net
ns3-04.azure-dns.org
ns4-04.azure-dns.info
ns1-04.azure-dns.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:168.245.49.105/32 ip4:54.240.30.198/32 ip4:54.240.30.199/32 ip4:52.56.103.10/32 ip4:52.56.102.31/32 ip4:35.177.105.167/32 include:spf.protection.outlook.com include:_spf-dc2.sapsf.com include:aws.us1.spf.staffbase.com include:spf.hosted.jaama.co.uk include:spf.topdesk.net include:ipreomail.com include:eskerondemand.com a:mail.hertfordshire.gov.uk -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; rf=afrf; pct=100; ri=86400
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
23 records- d365mktkey=i6aFmxnROfYNgDpPz8a9HQSjtCFUyFi2C6nUfsxWfXwx
- msfpkey=7eu7y8n942gkoiwrbwk3k8r2y
- _wu3fhqaxmhiwz1cpg9p2jw5wtfjuw45
- apple-domain-verification=QEMOXn51uk2YRUd3
- d365mktkey=MNcsFP3eofTEk5ok8xqISQxBf0uvVSbig8CBTPOxmRAx
- SPFv=spf1 ip4:168.245.49.105/32 ip4:54.240.30.198/32 ip4:54.240.30.199/32 ip4:52.56.103.10/32 ip4:52.56.102.31/32 ip4:35.177.105.167/32 include:spf.protection.outlook.com include:_spf-dc2.sapsf.com include:aws.us1.spf.staffbase.com include:spf.hosted.jaama.co.uk include:spf.topdesk.net include:ipreomail.com include:eskerondemand.com a:mail.hertfordshire.gov.uk -all
- d365mktkey=qdwhl2yvWRqe1xdsnuKWxPzkPZv5xxze02AHllp3yOEx
- paloaltonetworks-site-verification=15c445503fcf0d0334e0eef5aebfc48325207aa63575c7ac3ff968097cb3b0ff
- teamviewer-sso-verification=63b287cc33b14f7eb087509e421fc816
- j3pqch14l4ly104spx4bp9kw23sm2kfz
- Serco
- d365mktkey=JEcuKQcUc8HYcgDfeRVH8S5e40vlfho6dFxb67xIL1ox
- d365mktkey=N8pmeSdCmFlldPAe6VKZ5ZCSmiqblIKDsOXxTU7xkeMx
- docusign=f68fcb26-338e-4be9-9b0a-8853e2d0eb17
- d365mktkey=q1wtE6DMA1nW0KmKhNj6wRxaexo4OitfaZoperxCdQ8x
- access-domain-verification=9cf916a122ed5369aa3644483883393780418d4753d31019c5ab580a48d43425
- box-domain-verification=947ffa11d9b85ff523c6b3765e5f0cf2c87ae74352b70dbe71104ebf0953695f
- d365mktkey=cQmulkYEgxEAJvLDraml3mRJOyn0Vp0YibHGxDvFXK8x
- d365mktkey=SVQBZZfrdMmmuHyjTFB05bgAegQkADWtT0GARV0Ux54x
- atlassian-domain-verification=qSLeaosPqdoFnmcgEclgQh4QcfhJ29DkvMPIE8wAKnigw/tz5IDx2sJrYsg2Tv1W
- miro-verification=fe93d81f2e79f94fe43839fe175b823481ef54d6
- JkxMxl+6PCHDsjO54WeggFc40s+h04mhBOWLXccEqQA2j2q/XejbSCBY4q7QY2tQolLlTuOo3kj86LwEWnIYLQ==
- _o4hchqmzfuaghqqqk8268nvadbrsqx1
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