Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
onyxcentersource.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 04:37:51 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
- us-smtp-inbound-2.mimecast.com: 0
- us-smtp-inbound-1.mimecast.com: 0
A / AAAA Records
- 141.193.213.20 (no PTR)
- 141.193.213.21 (no PTR)
Mail Server IPs
- 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.221 ↩ us-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
ns-1737.awsdns-25.co.uk awsdns-hostmaster.amazon.com 2024041001 7200 900 1209600 86400
Primary NS (mname)
ns-1737.awsdns-25.co.uk
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
2024041001
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-831.awsdns-39.net
ns-1249.awsdns-28.org
ns-1737.awsdns-25.co.uk
ns-244.awsdns-30.com
SPF Record
✓ Strict (-all)
v=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:_spf.salesforce.com include:amazonses.com include:spf.sendinblue.com ip4:52.50.240.208 ip4:128.245.247.92 ip4:52.143.59.192 -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=none;pct=100;adkim=r;aspf=r;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 2 found
mail._domainkey
k1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
19 records- sending_domain1077663=8cf6e78a99a7ccc5e6bd247d91c92d373b3bf40bfdbb2afe4e4c90238e74af4a
- include:_spf.salesforce.com
- openai-domain-verification=dv-b5qSXJIt8NwCR3hBe46meYdL
- pardot1077663=5f3376922fb4d1805f1e511dcadba51a798c453ca29e1e40137af649db47ee7d
- jamf-site-verification=2H_b8OklPV1RUyWJWmibnA
- _ltos4ophcmqepao7pl4iv6lm0z9zzz2
- include:_spf.nanolearning.com
- atlassian-domain-verification=z2Dxzovm3HVN0RA1IcxroIZ24/qp6k15Tw9YeoNiH/ftrzEcvQ8pXgLqX4mqxbeB
- atlassian-sending-domain-verification=e6749d23-51b8-4db4-87a3-5a601b7cf8c7
- wiz-domain-verification=633fb519a4e65b41a590bef3303db802be656ee1f2d598c1da5b9a01cd501015
- ZOOM_verify_kO3TGV6cSZuwJQgotIk32A
- rippling-domain-verification=2c93a34fc3baa151
- SPFv=spf1 include:us._netblocks.mimecast.com include:spf.protection.outlook.com include:_spf.salesforce.com include:amazonses.com include:spf.sendinblue.com ip4:52.50.240.208 ip4:128.245.247.92 ip4:52.143.59.192 -all
- Sendinblue-code:3ce1fc4f1b5b87651d3cf63a5e9cfb2a
- google-site-verification=vH3dzF-B4ZrrxyBWVNpudoqYpdefuMgIKCyJPPpOARM
- dropbox-domain-verification=u8w7p1lwwnqp
- atlassian-domain-verification=qkLaxfnmNQQRKhw7Ce8IonlBZNapUuOAgIpwoeAPku79hDbJ8wQiVd26PNlwJR2R
- uau2cmc2i441p7j8hp2s1re6eu
- _fd7hmlugl3mx8z4g2jw15w2pzp99jxz
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