houston.rr.com

Valid Email Server
Domain Lookup › houston.rr.com

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
houston.rr.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-20 19:09:23 UTC · ↺ Refresh

MX Hostnames

  • dnvrco-postmx01.email.rr.com

MX Priorities

  • dnvrco-postmx01.email.rr.com: 5

A / AAAA Records

  • 75.180.132.221 ↩ cdptpa-smtpin01.houston.rr.com

Mail Server IPs

  • 107.14.64.159 ↩ dnvrco-postmx01.email.rr.com

SOA Record

Raw SOA dns1.rr.com hostmaster.charter.com 2025060000 43200 3600 2419200 3600
Primary NS (mname)
dns1.rr.com
Admin Email (rname)
hostmaster@charter.com
Serial
2025060000
Refresh
43200s
Retry
3600s
Expire
2419200s
Minimum TTL
3600s

Nameservers (NS)

dns6.rr.com
dns1.rr.com
dns3.rr.com
dns2.rr.com
dns5.rr.com

SPF Record

✗ Missing

No SPF record — domain is unprotected against spoofing.

⚠ No SPF record found. Email servers cannot verify authorized senders.

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

No TXT records found.

Full email verification for houston.rr.com

Run SMTP check, SPF/DKIM/DMARC and catch-all detection.

SPF / DKIM / DMARC Get 1,000 Free Credits