Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
earth.ac.cr
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-23 23:25:38 UTC · ↺ Refresh
MX Hostnames
- earth-ac-cr.mail.protection.outlook.com
MX Priorities
- earth-ac-cr.mail.protection.outlook.com: 0
A / AAAA Records
- 20.40.202.11 (no PTR)
Mail Server IPs
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 52.101.194.4 ↩ mail-ch4pr04cu00104.inbound.protection.outlook.com
- 52.101.41.28 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
- 2a01:111:f403:c946::3 ↩ mail-ch0pr04cu00603.inbound.protection.outlook.com
- 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1.earth.ac.cr admin.earth.ac.cr 2018051613 3600 600 1296000 3600
Primary NS (mname)
ns1.earth.ac.cr
Admin Email (rname)
admin@earth.ac.cr
Serial
2018051613
Refresh
3600s
Retry
600s
Expire
1296000s
Minimum TTL
3600s
Nameservers (NS)
ns1.earth.ac.cr
ns2.earth.ac.cr
SPF Record
✓ Soft Fail (~all)
v=spf1 mx ip4:201.207.42.2 ip4:201.207.49.6 ip4:201.206.132.62 ip4:104.130.69.83 ip4:192.237.180.183 ip4:205.201.128.0/20 ip4:198.2.128.0/18 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;aspf=r;adkim=r;fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
k1._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
4 records- AppID=0000000040079872
- zoho-verification=zb76536994.zmverify.zoho.com
- v=msv1 t=a10c524e1abf409877ec0fe80b41ce
- SPFv=spf1 mx ip4:201.207.42.2 ip4:201.207.49.6 ip4:201.206.132.62 ip4:104.130.69.83 ip4:192.237.180.183 ip4:205.201.128.0/20 ip4:198.2.128.0/18 include:spf.protection.outlook.com -all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for earth.ac.cr
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits