Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gralco.co
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 08:03:27 UTC · ↺ Refresh
MX Hostnames
- gralco-co.mail.protection.outlook.com
MX Priorities
- gralco-co.mail.protection.outlook.com: 0
A / AAAA Records
- 18.223.52.58 ↩ ec2-18-223-52-58.us-east-2.compute.amazonaws.com
- 54.235.109.100 ↩ ec2-54-235-109-100.compute-1.amazonaws.com
Mail Server IPs
- 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
- 52.101.8.46 ↩ mail-dm6pr05cu00406.inbound.protection.outlook.com
- 52.101.194.12 ↩ mail-ch0pr04cu00504.inbound.protection.outlook.com
- 52.101.194.13 ↩ mail-ch0pr04cu00605.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c91d:: ↩ mail-mw2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c902::1 ↩ mail-sj2pr05cu00401.inbound.protection.outlook.com
SOA Record
Raw SOA
nameserver01.mi.com.co hostmaster.gralco.co 2026021305 10800 3600 1209600 3600
Primary NS (mname)
nameserver01.mi.com.co
Admin Email (rname)
hostmaster@gralco.co
Serial
2026021305
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
nameserver03.mi.com.co
nameserver04.mi.com.co
nameserver02.mi.com.co
nameserver01.mi.com.co
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.mlsend.com include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:spf.protection.outlook.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
2 records- mailerlite-domain-verification=64d031f6b47ad64a807bafdd99fa268898d46e2d
- SPFv=spf1 include:_spf.mlsend.com include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email 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 gralco.co
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits