roundtree.bz

Valid Email Server
Domain Lookup › roundtree.bz

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
roundtree.bz
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-24 00:57:17 UTC · ↺ Refresh

MX Hostnames

  • roundtree-bz.mail.protection.outlook.com

MX Priorities

  • roundtree-bz.mail.protection.outlook.com: 10

A / AAAA Records

  • 137.118.21.11 ↩ hosting.gmavt.net

Mail Server IPs

  • 52.101.41.26 ↩ mail-sj0pr03cu01702.inbound.protection.outlook.com
  • 52.101.194.3 ↩ mail-ch1pr04cu00103.inbound.protection.outlook.com
  • 52.101.9.26 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
  • 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
  • 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
  • 2a01:111:f403:f910:: ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
  • 2a01:111:f403:f901::1 ↩ mail-bl0pr02cu00601.inbound.protection.outlook.com
  • 2a01:111:f403:c903::3 ↩ mail-mw2pr02cu00503.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.greenmountainaccess.net hostmaster.greenmountainaccess.net 2022110843 21600 1800 2592000 3600
Primary NS (mname)
ns1.greenmountainaccess.net
Admin Email (rname)
hostmaster@greenmountainaccess.net
Serial
2022110843
Refresh
21600s
Retry
1800s
Expire
2592000s
Minimum TTL
3600s

Nameservers (NS)

ns1.greenmountainaccess.net
ns2.greenmountainaccess.net

SPF Record

✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

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

2 records
  • MS=ms93580855
  • SPFv=spf1 include:spf.protection.outlook.com -all
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