rcbusiness.net

Valid Email Server
Domain Lookup › rcbusiness.net
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
rcbusiness.net
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-06-03 07:50:16 UTC · ↺ Refresh

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MX Hostnames

  • mx01.ionos.com
  • mx00.ionos.com

MX Priorities

  • mx01.ionos.com: 10
  • mx00.ionos.com: 10

A / AAAA Records

  • 74.208.236.249 ↩ 74-208-236-249.elastic-ssl.ui-r.com
  • 2607:f1c0:100f:f000::200 ↩ 2607-f1c0-100f-f000-0000-0000-0000-0200.elastic-ssl.ui-r.com

Mail Server IPs

  • 74.208.5.21 ↩ mx01.perfora.net
  • 74.208.5.3 ↩ mx00.perfora.net

SOA Record

Raw SOA ns1121.ui-dns.org hostmaster.1and1.com 2017063027 28800 7200 604800 300
Primary NS (mname)
ns1121.ui-dns.org
Admin Email (rname)
hostmaster@1and1.com
Serial
2017063027
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1022.ui-dns.de
ns1117.ui-dns.com
ns1121.ui-dns.org
ns1088.ui-dns.biz

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf-us.ionos.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate 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
  • DKIMv=DKIM1;t=s;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDA4y63vwbc4mT0LKb9Ij98VhGDgqPk7LwaOR5cAB6ecOYMgRgacfSVgQfG24yCJobQMTp3HhDn/gPToPocRaPLH9xV+7l99zG3h8ns4lX1eEX3aaF7iCCEG4sv1fPnQEWEDTuRwG/b3ZK4vt/TvOq6ZhLdmch5PmD5HHsTBTuiTQIDAQAB
  • SPFv=spf1 include:_spf-us.ionos.com ~all
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