Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
concentra.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 01:52:32 UTC · ↺ Refresh
MX Hostnames
- mxb-00122801.gslb.pphosted.com
- mxa-00122801.gslb.pphosted.com
MX Priorities
- mxa-00122801.gslb.pphosted.com: 10
- mxb-00122801.gslb.pphosted.com: 10
A / AAAA Records
- 104.17.255.171 (no PTR)
- 104.16.208.219 (no PTR)
- 2606:4700::6811:ffab (no PTR)
- 2606:4700::6810:d0db (no PTR)
Mail Server IPs
- 67.231.145.115 ↩ mx0a-00122801.pphosted.com
- 67.231.153.104 ↩ mx0b-00122801.pphosted.com
SOA Record
Raw SOA
fred.ns.cloudflare.com dns.cloudflare.com 2398365998 10000 2400 604800 1800
Primary NS (mname)
fred.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398365998
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
fred.ns.cloudflare.com
kiki.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.concentra.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected],mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected],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
20 records- d365mktkey=SGE0IdAuDZH6Lj5aUv3tqrqQGlZZSbNTElk4XZsZw90x
- Dynatrace-site-verification=68dbce21-82d4-4851-a9e3-d935737ee197__n01v4q68s43uojigv5p3ueqrgn
- MS=ms11781705
- dell-technologies-domain-verification=concentra.com_71c68bbb-8139-44a3-8d0b-9bb079af09f2_1715976622
- citrix.mobile.ads.otp=kj6izptwhm1ednojxulka
- ZOOM_verify_QHr64VMER0aaRQ_9gl1YWQ
- duo_sso_verification=jGBBTT6ZZpnFRLJcVwQqDy7KxJp12rv3qS5BiKlbR1sQ5op94ZnypsjqHR5iEdIs
- google-site-verification=8n0ouGIith3rpiO1lmMxnZScuRCnpLeBy3YdPPHdMy4
- duo_sso_verification=8IF15IJPGrd2pwl22It8izS3V3ORynb9WoVZzVBogtzbYPBWaRd5em4kuR5hLZuQ
- SPFv=spf1 include:_spf.concentra.com -all
- d365mktkey=nWpcaYqZ4VpcJxkrsuk9siIKzqtYVhDpKEjYttkw1Kwx
- atlassian-domain-verification=A6Dwb1guxx5SrhS81tasHZmgWP8w9GlpnwCyppVtDwvx/wu1eaoP4CKtQIt0GEIC
- adobe-idp-site-verification=b479089cf34db91bee399777c6a4e0bcab8ab780a8bf51cfad9bc826ea5db8ee
- qA/cCfhtU+amsiwHPNOtNG0qJ3OI5jNU3OTBGx4Rrqa1I7q1gLuYO9r2pG/e7pRZHTe7RJhlOxnSEN4C961zUg==
- miro-verification=b7d55360328e8e811f51fcdd5cde0431bd616762
- vmware-cloud-verification-49a1e61c-09b4-47fb-b464-edbbc1b95cf2
- docker-verification=d72578c9-f3c4-4856-aa3a-6fb59f3d6a1e
- Dynatrace-site-verification=9c77efd8-7964-46b1-84a2-6049c8662b29__gq2fe1g93thbcrbto5mpj2qudr
- jetbrains-domain-verification=a8dn8cd6uxpdh4yy5izdlw9fo
- docker-verification=1190b58a-e93b-4d08-94e8-48d331cf22fe
Full email verification for concentra.com
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