Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
symbicore.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 10:06:29 UTC · ↺ Refresh
MX Hostnames
- symbicore-com.mail.protection.outlook.com
MX Priorities
- symbicore-com.mail.protection.outlook.com: 100
A / AAAA Records
- 172.67.222.168 (no PTR)
- 104.21.38.127 (no PTR)
Mail Server IPs
- 52.101.190.2 ↩ mail-yt3pr01cu00602.inbound.protection.outlook.com
- 52.101.190.3 ↩ mail-yt6pr01cu00103.inbound.protection.outlook.com
- 52.101.190.0 ↩ mail-yt5pr01cu00100.inbound.protection.outlook.com
- 52.101.190.1 ↩ mail-yt3pr01cu00701.inbound.protection.outlook.com
- 2a01:111:f403:c944::1 ↩ mail-yqzpr01cu01001.inbound.protection.outlook.com
- 2a01:111:f403:c942:: ↩ mail-yt5pr01cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c942::1 ↩ mail-yt3pr01cu00701.inbound.protection.outlook.com
- 2a01:111:f403:c944:: ↩ mail-yqzpr01cu00900.inbound.protection.outlook.com
SOA Record
Raw SOA
carl.ns.cloudflare.com dns.cloudflare.com 2399297726 10000 2400 604800 1800
Primary NS (mname)
carl.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399297726
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
carl.ns.cloudflare.com
pola.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:spf.protection.outlook.com include:_spf.hubspotemail.net include:sendgrid.net ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
4 records- MS=ms42657461
- google-site-verification=X_ZL9vjFjP-ITk9_kmH04vJBIUUtzNXFXI58_iDF5go
- twilio-domain-verification=32944a3d1d9f91e17924c4bf4ce4e739
- SPFv=spf1 include:spf.protection.outlook.com include:_spf.hubspotemail.net include:sendgrid.net ~all
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