Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
coreandmain.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 19:10:39 UTC · ↺ Refresh
MX Hostnames
- coreandmain-com.mail.protection.outlook.com
MX Priorities
- coreandmain-com.mail.protection.outlook.com: 0
A / AAAA Records
- 104.18.27.196 (no PTR)
- 104.18.26.196 (no PTR)
Mail Server IPs
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.8.46 ↩ mail-dm6pr05cu00406.inbound.protection.outlook.com
- 52.101.8.44 ↩ mail-dm5pr04cu00104.inbound.protection.outlook.com
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
SOA Record
Raw SOA
aron.ns.cloudflare.com dns.cloudflare.com 2398722317 10000 2400 604800 1800
Primary NS (mname)
aron.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398722317
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
aron.ns.cloudflare.com
marty.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:21920662.spf07.hubspotemail.net include:_spf.act-on.net include:sendgrid.net ip4:192.48.98.50 ip4:173.252.165.208 ip4:192.48.98.254 ip4:67.20.178.231 ip4:192.254.115.42 ip4:131.153.250.73 ip4:131.153.250.254 ip4:162.142.76.0/24 ip4:23.251.237.159 ip4:23.251.237.168/29 ip4:168.245.23.22/32 ip4:149.72.174.169/32 ip4:149.72.218.83/32 ip4:149.72.164.200/32 ip4:23.251.237.159/32 ip4:23.251.237.160/29 ip4:23.251.237.168/30 ip4:143.55.230.80 -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; fo=1; ri=3600
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
mail._domainkey
✓ Public key: 392 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
13 records- zzmntcqp26hjfqh5bppktzxr5fyshlv8
- _h70zyesk1qravtgixvjx14nqsdy5rqp
- google-site-verification=qE4t5eKPmO39MhHjgWzd1Hi0zcT276c2GkOH3udBK6s
- SPFv=spf1 include:spf.protection.outlook.com include:21920662.spf07.hubspotemail.net include:_spf.act-on.net include:sendgrid.net ip4:192.48.98.50 ip4:173.252.165.208 ip4:192.48.98.254 ip4:67.20.178.231 ip4:192.254.115.42 ip4:131.153.250.73 ip4:131.153.250.254 ip4:162.142.76.0/24 ip4:23.251.237.159 ip4:23.251.237.168/29 ip4:168.245.23.22/32 ip4:149.72.174.169/32 ip4:149.72.218.83/32 ip4:149.72.164.200/32 ip4:23.251.237.159/32 ip4:23.251.237.160/29 ip4:23.251.237.168/30 ip4:143.55.230.80 -all
- google-site-verification=j_ySGUBAXgmZEf5tsTo1bgN9ckD3fykh8szHaGuTWbA
- sOqak7d2OHPsfunfPYyFjlRM9ka13/7kykwJARY0zSv5Qklz/SkUnPjawyH4X6jWK31mV3wh7XkOayMNCw0EbA==
- smartsheet-site-validation=DvPbxHINM46YjIzaxoXyivfZ1vzd72rw
- apple-domain-verification=reOULzRWIGBwcixt
- _0l1bq5rt0146lwu4f5yf2xg5ytg62ea
- MS=ms22748186
- paloaltonetworks-site-verification=aec8aeaeae42ef4d0498df656b078ff163c97ea0dacb5d6f5e9bc5ff331acbd4
- _77galyy03x7roczf5vlrk0f5y656pqj
- 2yfbkskn5mh3zsx3zsm2dxhmtgqkd161
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