zub.ch

Valid Email Server

Domain Overview

DNS: ✓ 1mo ago Checker: ✓ 1mo ago
zub.ch
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-09-16 01:14:57 UTC · ↺ Refresh

Add email validation to your forms — free

Add our free script to block 10,000+ disposable domains + perform other checks. No signup, unlimited checks.

MX validation Disposable detection Role accounts
Add to your signup form
<script src="https://check.verifyswift.com/"></script>
One line · No registration · See full docs & demo → · Customize →

MX Hostnames

  • zub-ch.mail.protection.outlook.com

MX Priorities

  • zub-ch.mail.protection.outlook.com: 10

A / AAAA Records

  • 165.160.13.20 (no PTR)
  • 165.160.15.20 (no PTR)

Mail Server IPs

  • 52.101.103.39 ↩ mail-miypr05cu00207.inbound.protection.outlook.com
  • 52.101.68.21 ↩ mail-db4pr02cu00205.inbound.protection.outlook.com
  • 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
  • 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
  • 2a01:111:f403:ca48::8 ↩ mail-miypr02cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca04::b ↩ mail-dbbpr03cu00103.inbound.protection.outlook.com
  • 2a01:111:f403:ca48::10 ↩ mail-miypr05cu00100.inbound.protection.outlook.com
  • 2a01:111:f403:ca09::a ↩ mail-am7pr02cu00202.inbound.protection.outlook.com

SOA Record

Raw SOA ns1.netnames.net hostmaster.cscdns.net 2018082014 10800 1800 3600000 21599
Primary NS (mname)
ns1.netnames.net
Admin Email (rname)
hostmaster@cscdns.net
Serial
2018082014
Refresh
10800s
Retry
1800s
Expire
3600000s
Minimum TTL
21599s

Nameservers (NS)

ns6.netnames.net
ns1.netnames.net
ns2.netnames.net
ns5.netnames.net

SPF Record

✓ Strict (-all)
v=spf1 ip4:217.192.190.221 ip4:195.72.65.221 ip4:212.113.84.141 ip4:195.72.65.221 ip4:213.95.13.132 ip4:213.95.13.133 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1;p=reject;sp=reject;adkim=s;aspf=s
✓ Reject — strongest protection
📋 SPF alignment: Strict · DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: reject

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
  • 6p6hcbszqclt4vr9vk025s4gkvf90zr7
  • +EnkUr5J3CUyOn04cgNk9nYJ/Tm9QCy8A+ltsXG/9hizo+Q9h7fEdg7V/mcXqRI/JQPFvdfrACdC181eKZ4ohw==
  • SPFv=spf1 ip4:217.192.190.221 ip4:195.72.65.221 ip4:212.113.84.141 ip4:195.72.65.221 ip4:213.95.13.132 ip4:213.95.13.133 include:spf.protection.outlook.com -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 · Customize →
See demo & docs
Deep verification
Full email verification for zub.ch

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

No credit card required
Get 1,000 Free Credits