krystal.io

Valid Email Server
Domain Lookup › krystal.io
Live data — DNS records and disposable check were just fetched and saved.

Domain Overview

DNS: ⚡ live Checker: ⚡ live
krystal.io
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-06-09 12:03:51 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

  • ALT1.ASPMX.L.GOOGLE.COM
  • ALT3.ASPMX.L.GOOGLE.COM
  • ASPMX.L.GOOGLE.COM
  • ALT2.ASPMX.L.GOOGLE.COM
  • ALT4.ASPMX.L.GOOGLE.COM

MX Priorities

  • alt3.aspmx.l.google.com: 10
  • alt2.aspmx.l.google.com: 5
  • aspmx.l.google.com: 1
  • alt1.aspmx.l.google.com: 5
  • alt4.aspmx.l.google.com: 10

A / AAAA Records

  • 185.22.208.168

Mail Server IPs

  • 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
  • 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
  • 172.253.116.27 ↩ dj-in-f27.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
  • 142.251.163.27 ↩ wv-in-f27.1e100.net
  • 2607:f8b0:4004:c19::1a ↩ bk-in-f26.1e100.net
  • 108.177.123.27 ↩ lcscld-in-f27.1e100.net
  • 2800:3f0:4003:c0f::1b (no PTR)
  • 173.194.76.26 ↩ ws-in-f26.1e100.net
  • 2a00:1450:400c:c00::1b ↩ ws-in-f27.1e100.net

SOA Record

Raw SOA ns1.katapult.io dns-admin.katapult.io 1780562395 28800 7200 604800 3600
Primary NS (mname)
ns1.katapult.io
Admin Email (rname)
dns-admin@katapult.io
Serial
1780562395
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns2.katapult.io
ns1.katapult.io

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:spf.postal.k.io include:_spf.createsend.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1;p=none;sp=none;adkim=r;aspf=r;pct=100;fo=1;rf=afrf;ri=86400;rua=mailto:[email protected];ruf=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

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

10 records
  • ahrefs-site-verification_1202dbcabba113554647c7df424663c9e9410a54bb4074ca2f8403ace10464c5
  • google-site-verification=gq7lpiCFwJlbt3IJZfGfhZalBlr4XNWGC5O3Fv50Y3s
  • apple-domain-verification=q2L2Gx34h5cCcdQ5
  • 584b482d3ceef8595fad2aba7b4bf0
  • MS=ms92842916
  • SPFv=spf1 include:_spf.google.com include:spf.postal.k.io include:_spf.createsend.com ~all
  • YB728J7X5UMZ4ORL65NW8R82TNYHDTT4R7XIVZ4Y
  • google-site-verification=QU7hixZP5cPZPIuG6oDu7YNYtXqJrGNudI4jTS3mb0w
  • anthropic-domain-verification-8g22pf=y37zxrqhW7kndRv0c90J2j9YB
  • google-site-verification=npEisDdJiZERG8-RGpeHjGX43ykZrLlpzmj1BKNx3qQ
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 krystal.io

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

No credit card required
Get 1,000 Free Credits