Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cancer.gov.co
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-06 14:25:45 UTC · ↺ Refresh
MX Hostnames
- gw16199.fortimail.com
MX Priorities
- gw16199.fortimail.com: 0
A / AAAA Records
- 172.67.68.53 (no PTR)
- 104.26.5.33 (no PTR)
- 104.26.4.33 (no PTR)
- 2606:4700:20::681a:521 (no PTR)
- 2606:4700:20::ac43:4435 (no PTR)
- 2606:4700:20::681a:421 (no PTR)
Mail Server IPs
- 66.35.16.199 ↩ gw16199.fortimail.com
SOA Record
Raw SOA
marjory.ns.cloudflare.com dns.cloudflare.com 2400806093 10000 2400 604800 1800
Primary NS (mname)
marjory.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400806093
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
will.ns.cloudflare.com
marjory.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a:mail.sealmail.co ip4:66.35.16.199 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; aspf=r;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
2 records- SPFv=spf1 a:mail.sealmail.co ip4:66.35.16.199 include:spf.protection.outlook.com -all
- ms-domain-verification=a4e296c0-56a6-451c-9404-c8d9b5394b1e
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 cancer.gov.co
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits