Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rcbo.org
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-19 12:47:38 UTC · ↺ Refresh
MX Hostnames
- d333264a.ess.barracudanetworks.com
MX Priorities
- d333264a.ess.barracudanetworks.com: 0
A / AAAA Records
- 141.193.213.20 (no PTR)
- 141.193.213.21 (no PTR)
Mail Server IPs
- 209.222.82.252 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
pdns07.domaincontrol.com dns.jomax.net 2026012600 28800 7200 604800 600
Primary NS (mname)
pdns07.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2026012600
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
pdns07.domaincontrol.com
pdns08.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:spf.dynect.net include:nw026.com include:nw027.com include:nw028.com include:autotask.net include:servers.mcsv.net ip4:149.72.175.172 include:_spf.psm.knowbe4.com include:spf.US.exclaimer.net -all
📊 DNS lookups: 9/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected],mailto:[email protected]; pct=100; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
6 records- monday-com-verification=49HOeshIxlAEEM8jtS2Wt56Ujn5cBzYCMjuYSsM8wxo
- google-site-verification=tYrrsmc0_S8RIXFyIjh6hIMxEnmwMGFhIo3T5SR4He4
- //gvbNaHSTf/rZqkUY8Ufl4asjYdbL2npVw+Eqat5NHKli1An4X5HlMPj7ckb9qlpqxOn3FWpltWBzGJ6jABZQ==
- SPFv=spf1 include:spf.protection.outlook.com include:spf.dynect.net include:nw026.com include:nw027.com include:nw028.com include:autotask.net include:servers.mcsv.net ip4:149.72.175.172 include:_spf.psm.knowbe4.com include:spf.US.exclaimer.net -all
- dfm1h5o60geluuptavhg52k6m3
- MS=ms40162548
Full email verification for rcbo.org
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits