Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dersa.com.co
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-28 11:55:27 UTC · ↺ Refresh
MX Hostnames
- mx01.hornetsecurity.com
- mx02.hornetsecurity.com
- mx04.hornetsecurity.com
- mx03.hornetsecurity.com
MX Priorities
- mx02.hornetsecurity.com: 1
- mx01.hornetsecurity.com: 0
- mx03.hornetsecurity.com: 2
- mx04.hornetsecurity.com: 3
A / AAAA Records
- 46.202.182.112 (no PTR)
Mail Server IPs
- 94.100.136.8 ↩ mx02.hornetsecurity.com
- 94.100.132.8 ↩ mx01.hornetsecurity.com
- 94.100.134.8 ↩ mx03.hornetsecurity.com
- 94.100.136.7 ↩ mx04.hornetsecurity.com
SOA Record
Raw SOA
nameserver01.mi.com.co hostmaster.dersa.com.co 2026032601 10800 3600 1209600 3600
Primary NS (mname)
nameserver01.mi.com.co
Admin Email (rname)
hostmaster@dersa.com.co
Serial
2026032601
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
nameserver04.mi.com.co
nameserver01.mi.com.co
nameserver02.mi.com.co
nameserver03.mi.com.co
SPF Record
✓ Strict (-all)
v=spf1 mx include:spf.protection.outlook.com include:spf.hornetsecurity.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=none;pct=99;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
⚠ Policy applies to 99% of failing messages only
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
6 records- MS=ms65055882.............
- iAvbYbnGq15Wa74aKMGYB+TooSPu38q1OOzx/AEQ/2bKC00EVmT9O5kDvkXTNPhdJdWOtzFm2S49UZz/YZy6Cw==iAvbYbnGq15Wa74aKMGYB+TooSPu38q1OOzx/AEQ/2bKC00EVmT9O5kDvkXTNPhdJdWOtzFm2S49UZz/YZy6Cw==iAvbYbnGq15Wa74aKMGYB+TooSPu38q1OOzx/AEQ/2bKC00EVmT9O5kDvkXTNPhdJdWOtzFm2S49UZz/YZy6Cw==...........
- facebook-domain-verification=2n9bbhnrmdfegmzreykwkmect2ant4....
- SPFv=spf1 mx include:spf.protection.outlook.com include:spf.hornetsecurity.com -all
- F0A4B39473..............
- MS=ms44189889............
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