on4u.es

Valid Email Server
Domain Lookup › on4u.es

Domain Overview

DNS: ✓ just now Checker: ✓ just now
on4u.es
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-09-23 11:43:08 UTC · ↺ Refresh

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MX Hostnames

  • alt2.aspmx.l.google.com
  • aspmx3.googlemail.com
  • alt1.aspmx.l.google.com
  • aspmx2.googlemail.com
  • aspmx.l.google.com

MX Priorities

  • aspmx3.googlemail.com: 10
  • alt1.aspmx.l.google.com: 5
  • alt2.aspmx.l.google.com: 5
  • aspmx.l.google.com: 1
  • aspmx2.googlemail.com: 10

A / AAAA Records

  • 54.37.42.239 ↩ ip239.ip-54-37-42.eu

Mail Server IPs

  • 172.253.116.27 ↩ dj-in-f27.1e100.net
  • 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
  • 192.178.234.26 ↩ ncsclj-in-f26.1e100.net
  • 2800:3f0:4003:c14::1b (no PTR)
  • 172.253.63.27 ↩ bi-in-f27.1e100.net
  • 2607:f8b0:4004:c1d::1b ↩ ww-in-f27.1e100.net
  • 192.178.234.27 ↩ ncsclj-in-f27.1e100.net

SOA Record

Raw SOA leah.ns.cloudflare.com dns.cloudflare.com 2414337679 10000 2400 604800 1800
Primary NS (mname)
leah.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2414337679
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

leah.ns.cloudflare.com
seth.ns.cloudflare.com

SPF Record

✓ Soft Fail (~all)
v=spf1 ip4:188.165.130.201 ip4:51.255.4.194 include:_spf.google.com include:spf.mandrillapp.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected];
⚠ p=none — monitoring only, no enforcement
📋 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

9 records
  • google-site-verification=TgEoYsllimLrIhwpzTvesr0KeoIuEnu_ZfEPdogFMAs
  • jetbrains-domain-verification=3co6voklcd6goc156kwp9t57y
  • parking=abdd210b7830f9567095a10727180f8a
  • slack-domain-verification=h4Hl84duPjRcPKo0LFaBIE1IIdxv02GEaaJBTPdA
  • SPFv=spf1 ip4:188.165.130.201 ip4:51.255.4.194 include:_spf.google.com include:spf.mandrillapp.com ~all
  • www=dbe105cd89d1b7513b094d784e884476
  • anthropic-domain-verification-pq82bz=jofaR9Ouy0Glas7Y94xcBMmLc
  • apple-domain-verification=4ES0STdfh3gU5st9
  • google-site-verification=Pa-e-_Rf8SmJ5_FJxxNVp0CRzBkjuE3E4caPWDxzUbM
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