Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
horizonlines.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 19:11:10 UTC · ↺ Refresh
MX Hostnames
- mxb-003d7501.gslb.pphosted.com
- mxa-003d7501.gslb.pphosted.com
MX Priorities
- mxb-003d7501.gslb.pphosted.com: 10
- mxa-003d7501.gslb.pphosted.com: 10
A / AAAA Records
- 54.191.10.230 ↩ ec2-54-191-10-230.us-west-2.compute.amazonaws.com
- 54.187.253.26 ↩ ec2-54-187-253-26.us-west-2.compute.amazonaws.com
Mail Server IPs
- 205.220.173.6 ↩ mx0b-003d7501.pphosted.com
- 205.220.161.6 ↩ mx0a-003d7501.pphosted.com
SOA Record
Raw SOA
ns-781.awsdns-33.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-781.awsdns-33.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-781.awsdns-33.net
ns-95.awsdns-11.com
ns-1165.awsdns-17.org
ns-1964.awsdns-53.co.uk
SPF Record
✓ Strict (-all)
v=spf1 ip4:12.174.172.226 ip4:67.222.221.84 include:spf-003d7501.pphosted.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
3 records- 2XFXLtKqSZnLH5Yq/lQd7CCuvxuLEVWOpqAhKqPmEeOYuupRanuxxk+gJOF+/3wVjZO3Dwhc8Ybv2dRV0pUbEA==
- MS=ms19642902
- SPFv=spf1 ip4:12.174.172.226 ip4:67.222.221.84 include:spf-003d7501.pphosted.com include:spf.protection.outlook.com -all
Full email verification for horizonlines.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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