Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
esb.de
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-28 14:15:27 UTC · ↺ Refresh
MX Hostnames
- de-smtp-inbound-2.mimecast.com
- de-smtp-inbound-1.mimecast.com
MX Priorities
- de-smtp-inbound-2.mimecast.com: 50
- de-smtp-inbound-1.mimecast.com: 50
A / AAAA Records
- 138.201.249.94 ↩ mail1.tdextern.de
Mail Server IPs
- 194.104.110.22 ↩ de-smtp-inbound-1.mimecast.com
- 194.104.108.22 ↩ de-smtp-inbound-2.mimecast.com
SOA Record
Raw SOA
ns.inwx.de hostmaster.inwx.de 2026032303 10800 3600 1209600 3600
Primary NS (mname)
ns.inwx.de
Admin Email (rname)
hostmaster@inwx.de
Serial
2026032303
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns.inwx.de
ns2.inwx.de
ns3.inwx.eu
SPF Record
✓ Soft Fail (~all)
v=spf1 a:mx01.rexx-systems.de ip4:194.77.230.128/26 ip4:138.201.249.94/32 ip4:52.157.149.216/32 include:spf-westeu.emailsignatures365.com include:de._netblocks.mimecast.com include:_spf.salesforce.com include:spf.zohomail360.eu include:inxserver.com include:_spf.zimpel.de ~all
📊 DNS lookups: 7/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → 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
15 records- docusign=952652ef-d209-453d-8d93-5278dbd367df
- security_contact=mailto:[email protected]
- google-site-verification=TG51MPvDTo6zLvgqhNIOwlvEWHW04UB_vxTD4pb113Q
- docusign=4a0cf428-a3a1-4821-b2f0-e03af21703f5
- 6m+me78cgA0KZzUP/6MTUlT+C4afsSNF99Kpz2PLUfPkgJJH6UXvwLUrwXWctmmBXZiBOCuI+DM0nWD5ViAyHg==
- 1password-site-verification=CUG25FUU6FDHZA7N37DU63SSYU
- slack-domain-verification=cfgEfiUSuRu43pvnbkrKVHmw8FW6tIxfvYX3K7ee
- facebook-domain-verification=nj3h442mbize7qhiipz0zbv5fq7d61
- SPFv=spf1 a:mx01.rexx-systems.de ip4:194.77.230.128/26 ip4:138.201.249.94/32 ip4:52.157.149.216/32 include:spf-westeu.emailsignatures365.com include:de._netblocks.mimecast.com include:_spf.salesforce.com include:spf.zohomail360.eu include:inxserver.com include:_spf.zimpel.de ~all
- site24x7-signals-domain-verification=9312f49dfe3ffcab6208717d952af88d
- new-relic-domain-verification=937d3e18bd184123acf9b018d44a6d1e
- ZA=6pRyIahNLCBrXyNYAU0DuQ==
- asv=e5b3140b2cbe564c927ca4e4e8818e93
- apple-domain-verification=kYvBoACbAJfI9WC8
- teamviewer-sso-verification=65228fd75c024968881873bf713461aa
Full email verification for esb.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits