thirteengroup.co.uk

Valid Email Server
Domain Lookup › thirteengroup.co.uk

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
thirteengroup.co.uk
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-20 19:51:59 UTC · ↺ Refresh

MX Hostnames

  • eu-smtp-inbound-1.mimecast.com
  • eu-smtp-inbound-2.mimecast.com

MX Priorities

  • eu-smtp-inbound-2.mimecast.com: 10
  • eu-smtp-inbound-1.mimecast.com: 10

A / AAAA Records

  • 51.104.28.80 (no PTR)

Mail Server IPs

  • 91.220.42.241 ↩ eu-smtp-inbound-2.mimecast.com
  • 195.130.217.241 ↩ eu-smtp-inbound-2.mimecast.com
  • 195.130.217.211 ↩ eu-smtp-inbound-2.mimecast.com
  • 195.130.217.201 ↩ eu-smtp-inbound-1.mimecast.com
  • 91.220.42.211 ↩ eu-smtp-inbound-1.mimecast.com
  • 91.220.42.201 ↩ eu-smtp-inbound-1.mimecast.com

SOA Record

Raw SOA ns37.domaincontrol.com dns.jomax.net 2026032002 28800 7200 604800 600
Primary NS (mname)
ns37.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2026032002
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s

Nameservers (NS)

ns37.domaincontrol.com
ns38.domaincontrol.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:194.168.214.200 include:eu._netblocks.mimecast.com include:_spf.psm.knowbe4.com include:spf.protection.outlook.com include:_vccnets.8x8.com include:_spf.createsend.com include:marketing.dynamics.com include:spf.bigchange.com include:_spf.elasticemail.com -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

19 records
  • logmein-verification-code=bQluA4uPraeOywxZwhWjoA2Gk
  • workplace-domain-verification=Fzfmchwhh8YP1h59w8hhQGssE6uMXV
  • clio-domain-verification=5a66c17f73b85fda0591420bac9cff07
  • MS=ms85764655
  • atlassian-domain-verification=KMG5Y3eV1rP4SQJPZhrmRPast9p1H834NG4w8AxU8RS6wsYn1QoVxnpULnr6nbiy
  • google-site-verification=TULi5EjMI-vzlQIifadF5-pe7KMUhlTBjf8e9Oy9_wo
  • onetrust-domain-verification=58fd131ac9c943e1983760359683b377
  • SPFv=spf1 ip4:194.168.214.200 include:eu._netblocks.mimecast.com include:_spf.psm.knowbe4.com include:spf.protection.outlook.com include:_vccnets.8x8.com include:_spf.createsend.com include:marketing.dynamics.com include:spf.bigchange.com include:_spf.elasticemail.com -all
  • dropbox-domain-verification=gvf02np9xucc
  • _p9xhg7zugplt650zfcxly9cq0f91fnk
  • _vceo6hwg2t27gfbcyhmso0q13t1j1ec
  • Rc1LaqjGGZ4/uiJASk70SaGDqR1TIVqSM5l1m8MYmyUhDVDR+PRWoyea50GmgR85P2ENjMBt6lNfGnAlVuFkoQ==
  • ZOOM_verify_p08hh1-URvGrQAk6I0N2QA
  • adobe-idp-site-verification=9d186fd497ee067eb7fd28e85a68e2497a49ffe2b44595801c44ebb021e4327a
  • google-site-verification=zGbLAG5I7xY_tsOhMnSLORCfyUIL-351BG1QZS63DBo
  • d365mktkey=yPuNF5PSHThP7cuSXjn7lte70ZQxwyC0ht38angCtuAx
  • google-site-verification=LWxxs_P2YDRs3tM24OJJJLwsECHQ35OOtfC2kLCKiE8
  • apple-domain-verification=YlKL94c0pOE9mXFr
  • 0ed1fe018acda133a68ebb479881af06a8c6b88406
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