sik-holz.de

Valid Email Server
Domain Lookup › sik-holz.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
sik-holz.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-28 01:28:52 UTC · ↺ Refresh

MX Hostnames

  • mx2.mas.t-systems-service.com
  • mx1.mas.t-systems-service.com

MX Priorities

  • mx2.mas.t-systems-service.com: 20
  • mx1.mas.t-systems-service.com: 10

A / AAAA Records

  • 92.205.198.131 ↩ sh22935.ispgateway.de

Mail Server IPs

  • 217.150.155.12 ↩ mgb-mta02.mas.t-systems-service.com
  • 46.29.101.1 ↩ muc-mta01.mas.t-systems-service.com
  • 46.29.101.2 ↩ muc-mta02.mas.t-systems-service.com
  • 217.150.155.10 ↩ mgb-mta01.mas.t-systems-service.com

SOA Record

Raw SOA dns01-tld.t-online.de dns.telekom.de 2026011506 21600 3600 604800 86400
Primary NS (mname)
dns01-tld.t-online.de
Admin Email (rname)
dns@telekom.de
Serial
2026011506
Refresh
21600s
Retry
3600s
Expire
604800s
Minimum TTL
86400s

Nameservers (NS)

dns02-tld.t-online.de
dns01-tld.t-online.de

SPF Record

✓ Strict (-all)
v=spf1 a:spf.mas.t-systems-service.com ip4:87.138.224.57 ip4:92.205.198.131 ip4:194.25.134.16/29 ip4:194.25.134.80/29 ip4:80.150.6.143 ip6:2003:2:2:15:80:150:6:150 -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; adkim=s; aspf=s; fo=1
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict · DKIM alignment: Strict
📧 Reports → mailto:[email protected]

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

3 records
  • apple-domain-verification=daDIVjHVK89qjsoW
  • l422cjj3uq4s8skh8fcooqg4j1
  • SPFv=spf1 a:spf.mas.t-systems-service.com ip4:87.138.224.57 ip4:92.205.198.131 ip4:194.25.134.16/29 ip4:194.25.134.80/29 ip4:80.150.6.143 ip6:2003:2:2:15:80:150:6:150 -all
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for sik-holz.de

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits