Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
catocorp.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 02:39:23 UTC · ↺ Refresh
MX Hostnames
- smtp01.catocorp.com
MX Priorities
- smtp01.catocorp.com: 10
A / AAAA Records
- 104.18.27.103 (no PTR)
- 104.18.26.103 (no PTR)
- 2606:4700::6812:1a67 (no PTR)
- 2606:4700::6812:1b67 (no PTR)
Mail Server IPs
- 165.166.104.13 ↩ smtp01.catocorp.com
SOA Record
Raw SOA
john.ns.cloudflare.com dns.cloudflare.com 2397946648 10000 2400 604800 1800
Primary NS (mname)
john.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397946648
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
john.ns.cloudflare.com
lana.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 mx a -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 3 found
k1._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
7 records- MS=6A48DE856FB217658C10BBFD98D5D032A46298E8
- duo_sso_verification=WBnrefcsc5781vQbpJ0jj37O81KPJiR4sdgaGrJfQfijaF93PFKiup56wc5y0ms0
- gLdX7gkTe8bIFlXwwbmpNBoUiZdAloAJFw78AO3QL/8=.
- k4b6qunvq6ocieb13k15otfj72
- tb37fckvgkolh3sa5ng19h5b0h
- SPFv=spf1 mx a -all
- 6v0v98hj9qo99codt5dml7k984
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