Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
thegroundup.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 04:55:53 UTC · ↺ Refresh
MX Hostnames
- usb-smtp-inbound-2.mimecast.com
- usb-smtp-inbound-1.mimecast.com
MX Priorities
- usb-smtp-inbound-1.mimecast.com: 0
- usb-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 50.6.4.217 ↩ server.ceres-global.com
Mail Server IPs
- 170.10.152.242 ↩ usb-smtp-delivery-2.mimecast.com
- 170.10.150.242 ↩ usb-smtp-delivery-2.mimecast.com
SOA Record
Raw SOA
ns1.ceres-global.com it.ceresenv.com 2026030101 3600 1800 1209600 86400
Primary NS (mname)
ns1.ceres-global.com
Admin Email (rname)
it@ceresenv.com
Serial
2026030101
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns2.ceres-global.com
ns1.ceres-global.com
SPF Record
✓ Strict (-all)
v=spf1 include:usb._netblocks.mimecast.com include:_spf.psm.knowbe4.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- atlassian-domain-verification=RAaGpRTTyWODo7aFO6UCAUH8UCQxb35CP17J02pDxd6ObXIR5qEG9tcihnQSBlNB
- zscaler-verification-216198400519962624-9082025-ABLOlgB
- knowbe4-site-verification=83501e8b396d691ea910f23a25af8815
- SPFv=spf1 include:usb._netblocks.mimecast.com include:_spf.psm.knowbe4.com -all
- MS=ms30205782
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