Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
celus.io
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 09:04:57 UTC · ↺ Refresh
MX Hostnames
- celus-io.mail.protection.outlook.com
MX Priorities
- celus-io.mail.protection.outlook.com: 0
A / AAAA Records
- 199.60.103.53 (no PTR)
- 199.60.103.153 (no PTR)
Mail Server IPs
- 52.101.68.12 ↩ mail-db9pr02cu00204.inbound.protection.outlook.com
- 52.101.73.11 ↩ mail-am1pr04cu00103.inbound.protection.outlook.com
- 52.101.68.3 ↩ mail-db7pr03cu00403.inbound.protection.outlook.com
- 52.101.68.36 ↩ mail-db5pr02cu00104.inbound.protection.outlook.com
- 2a01:111:f403:ca09::8 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::2 ↩ mail-du2pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca04::6 ↩ mail-db4pr02cu00406.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-1022.awsdns-63.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1022.awsdns-63.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-230.awsdns-28.com
ns-1022.awsdns-63.net
ns-1136.awsdns-14.org
ns-1835.awsdns-37.co.uk
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.mailjet.com include:mailgun.org include:7288952.spf05.hubspotemail.net -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._domainkey
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
10 records- v=verifydomain MS=6726225
- ZOOM_verify_PBMLRlOKRi2fSw3WvivEJg
- apple-domain-verification=l9aEs9iiQJRQhy1t
- atlassian-domain-verification=icNN9iLsuz2OG52vazZTzKikoQcmFljg3DQDqIjbr7LROmK8gv8DIUZZvgXZZVfP
- figma-domain-verification=46cd1e3ee40c16d3da1dbf3630f1fe61cfa080a14234249b1e6b85df66c5be77-1724769749
- google-site-verification=OPuVrHJkWqnop92__t6di0f1cIIW8kkDBxUBdYasRRk
- google-site-verification=dAD1DQDS-yH1b0VJROE_8j0ZPtDoTy3EcILjEj4iQAc
- prodpad-domain-verification=TVLdmWGxV9Zrz5WH+PSqE0b3gWA981N3cIJ46QmAoz8=
- uber-domain-verification=cdbe0b84-ed69-40fa-b231-cc22059cf11f
- SPFv=spf1 include:spf.protection.outlook.com include:spf.mailjet.com include:mailgun.org include:7288952.spf05.hubspotemail.net -all
Full email verification for celus.io
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits