Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
horizononline.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-20 00:52:22 UTC · ↺ Refresh
MX Hostnames
- usb-smtp-inbound-1.mimecast.com
- usb-smtp-inbound-2.mimecast.com
MX Priorities
- usb-smtp-inbound-2.mimecast.com: 10
- usb-smtp-inbound-1.mimecast.com: 10
A / AAAA Records
- 172.64.151.122 (no PTR)
- 104.18.36.134 (no PTR)
- 2a06:98c1:3103::ac40:977a (no PTR)
- 2606:4700:440c::6812:2486 (no PTR)
Mail Server IPs
- 170.10.150.242 ↩ usb-smtp-delivery-2.mimecast.com
- 170.10.152.242 ↩ usb-smtp-delivery-2.mimecast.com
SOA Record
Raw SOA
ivy.ns.cloudflare.com dns.cloudflare.com 2398855724 10000 2400 604800 1800
Primary NS (mname)
ivy.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398855724
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
yadiel.ns.cloudflare.com
ivy.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 redirect=9iax8oov._spf._d.mim.ec
📊 DNS lookups: 1/10
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
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
7 records- google-site-verification=QKzueNc2s-lOoNJlVKY2CFZ5EupAbjU1EHisxpHK-Ss
- google-site-verification=S2DGhFE294boEh_qxkr9D9mE2duBGYu7DqYytVMQ6B0
- google-site-verification=lrRh25NOyNNjo8WoWgduoupkForgyg5URdCLbCDyF0k
- SPFv=spf1 redirect=9iax8oov._spf._d.mim.ec
- MS=ms45220835
- ZEEsN2uMsYwFetuLxImtMstRJag7cJql+RgL+1eMdzHtjhF+n5OZJvXuOwVeVAZo7sUYr2sHHU5aLJNcnZUSUw==
- d365mktkey=FaXZz5jViqLIJpJ8rJkdv2DHCprG5VNxSyMxwSlD9KMx
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