Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
checkmk.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-28 10:45:47 UTC · ↺ Refresh
MX Hostnames
- alt3.aspmx.l.google.com
- alt4.aspmx.l.google.com
- aspmx.l.google.com
- alt1.aspmx.l.google.com
- alt2.aspmx.l.google.com
MX Priorities
- alt4.aspmx.l.google.com: 10
- aspmx.l.google.com: 1
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- alt3.aspmx.l.google.com: 10
A / AAAA Records
- 45.133.11.28
- 2a0a:51c1::5:0:0:0:4
Mail Server IPs
- 173.194.76.26 ↩ ws-in-f26.1e100.net
- 2a00:1450:400c:c00::1b ↩ ws-in-x1b.1e100.net
- 142.251.167.27 ↩ ww-in-f27.1e100.net
- 2607:f8b0:4004:c06::1b ↩ bg-in-f27.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.26 ↩ dj-in-f26.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
- 2a00:1450:4009:c0f::1b ↩ yulhrs-in-f27.1e100.net
SOA Record
Raw SOA
ns.inwx.de admin.checkmk.com 2026032601 3600 1800 1209600 86400
Primary NS (mname)
ns.inwx.de
Admin Email (rname)
admin@checkmk.com
Serial
2026032601
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns2.inwx.de
ns4.he.net
ns1.he.net
ns.inwx.de
ns2.he.net
ns5.he.net
ns3.he.net
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:45.133.11.0/26 ip6:2a0a:51c1:0:5::/64 include:5202598.spf01.hubspotemail.net include:_spf.google.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; pct=100
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
13 records- slack-domain-verification=QOpNbUdNys7oOI6WEDi0Zz2o7Cm5EplGqB2lN4pP
- SPFv=spf1 ip4:45.133.11.0/26 ip6:2a0a:51c1:0:5::/64 include:5202598.spf01.hubspotemail.net include:_spf.google.com ~all
- yahoo-verification-key=SfVhTcx9nJbrUwRodJt0r669eRR2TX0G83Gz1beOygo=
- ZOOM_verify_wH9fWw6gbQ1VO3o6VS2TfU
- amazon-business-verification=8901afee0b8a267d515a4dcbbcc445429a1c71575f05245219299e9e4cc7b805
- anthropic-domain-verification-0jj92r=Hs7nBXHEThYiHT0TjKTYOT0Ow
- atlassian-domain-verification=aruuh2bN0nNRkAbi7KhvFDev/BX6DWk6qj3cBsASpo67bALCaLWPPShwtweVYGII
- google-site-verification=R2GBikiCn07XAzg6ZJ4Z52kBG_CpyZ0aidQCgQefMbY
- google-site-verification=oCZ7qUrWl9OuRWPRfSeMRmd98dZm4DTxlJ8K2K2Dtcc
- google-site-verification=oeeXXZPp7XKGGdVg4bC7VsbShPw6YxWCnUCEgk_d1zQ
- google-site-verification=uvg85k2W5vOQvq5ty4rzazdiyKfW1DbS3BuH8stEBOs
- have-i-been-pwned-verification=6d97e6572253d7cadcf5af79ceeaeb32
- jetbrains-domain-verification=22y0xr7ueeudevw3zjqm3jn3x
Full email verification for checkmk.com
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