Domain Overview
DNS: ✓ 2h ago
Checker: ✓ 2h ago
costconcs.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 23:29:17 UTC · ↺ Refresh
MX Hostnames
- costconcs-com.mail.protection.outlook.com
MX Priorities
- costconcs-com.mail.protection.outlook.com: 10
A / AAAA Records
- 35.212.44.251 ↩ 251.44.212.35.bc.googleusercontent.com
Mail Server IPs
- 40.93.192.4 ↩ mail-dm2pr04cu00404.inbound.protection.outlook.com
- 52.101.40.4 ↩ mail-cy5pr03cu00204.inbound.protection.outlook.com
- 52.101.10.5 ↩ mail-bn6pr04cu00105.inbound.protection.outlook.com
- 52.101.50.10 ↩ mail-mw2pr02cu00502.inbound.protection.outlook.com
- 2a01:111:f403:c91d::b ↩ mail-mw2pr02cu00603.inbound.protection.outlook.com
- 2a01:111:f403:f90b:: ↩ mail-bn6pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f908::2 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.siteground.net admins.siteground.com 190 86400 7200 3600000 86400
Primary NS (mname)
ns1.siteground.net
Admin Email (rname)
admins@siteground.com
Serial
190
Refresh
86400s
Retry
7200s
Expire
3600000s
Minimum TTL
86400s
Nameservers (NS)
ns2.siteground.net
ns1.siteground.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:costconcs.com.spf.auto.dnssmarthost.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; aspf=r; adkim=r;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- MS=ms94628313
- SPFv=spf1 include:spf.protection.outlook.com include:costconcs.com.spf.auto.dnssmarthost.net -all
Full email verification for costconcs.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits