johnsonsca.com

Valid Email Server
Domain Lookup › johnsonsca.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
johnsonsca.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-22 01:18:10 UTC · ↺ Refresh

MX Hostnames

  • johnsonsca-com.mail.protection.outlook.com

MX Priorities

  • johnsonsca-com.mail.protection.outlook.com: 0

A / AAAA Records

  • 5.2.21.156 (no PTR)

Mail Server IPs

  • 52.101.73.16 ↩ mail-as2pr05cu00100.inbound.protection.outlook.com
  • 52.101.73.8 ↩ mail-am0pr04cu00500.inbound.protection.outlook.com
  • 52.101.73.4 ↩ mail-am0pr83cu00404.inbound.protection.outlook.com
  • 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::6 ↩ mail-am4pr0401cu00106.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::4 ↩ mail-am0pr04cu00504.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::9 ↩ mail-as8pr04cu00801.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.stackdns.com hostmaster.stackdns.com 1772635448 1800 900 1209600 300
Primary NS (mname)
ns1.stackdns.com
Admin Email (rname)
hostmaster@stackdns.com
Serial
1772635448
Refresh
1800s
Retry
900s
Expire
1209600s
Minimum TTL
300s

Nameservers (NS)

ns2.stackdns.com
ns3.stackdns.com
ns4.stackdns.com
ns1.stackdns.com

SPF Record

✓ Strict (-all)
v=spf1 include:servers.mcsv.net include:spf.uk.exclaimer.net include:spf.protection.outlook.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✓ 3 found
selector1._domainkey
selector2._domainkey
k1._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

3 records
  • DMARCv=DMARC1; p=none; rua=mailto:[email protected]
  • q21ds3erc43t2ata1q9hee5oih
  • SPFv=spf1 include:servers.mcsv.net include:spf.uk.exclaimer.net include:spf.protection.outlook.com -all
Full email verification for johnsonsca.com

Run SMTP check, SPF/DKIM/DMARC and catch-all detection.

SPF / DKIM / DMARC Get 1,000 Free Credits