letterzaken.nl

Valid Email Server
Domain Lookup › letterzaken.nl

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
letterzaken.nl
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-21 02:23:16 UTC · ↺ Refresh

MX Hostnames

  • mail.protonmail.ch
  • mailsec.protonmail.ch

MX Priorities

  • mail.protonmail.ch: 10
  • mailsec.protonmail.ch: 20

A / AAAA Records

  • 162.159.134.42 (no PTR)

Mail Server IPs

  • 185.70.42.128 ↩ mail.protonmail.ch
  • 185.205.70.128 ↩ mail.protonmail.ch
  • 176.119.200.128 ↩ mail.protonmail.ch
  • 185.70.42.129 ↩ mailsec.protonmail.ch
  • 185.205.70.129 ↩ mailsec.protonmail.ch
  • 176.119.200.129 ↩ mailsec.protonmail.ch

SOA Record

Raw SOA ns1.thednscompany.com ns1.thednscompany.com 2026012203 28800 7200 1209600 3600
Primary NS (mname)
ns1.thednscompany.com
Admin Email (rname)
ns1@thednscompany.com
Serial
2026012203
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

ns1.thednscompany.com
ns2.thednscompany.com
ns3.thednscompany.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.protonmail.ch include:sparkpostmail.com include:emsd1.com a:w010.vx.ativ.mooieserver.nl ip4:92.63.163.52 ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

4 records
  • google-site-verification=YvyvEUMOgwMHIbWhkE8x00nM6nwQWd4zcND2FgmzqYw
  • protonmail-verification=afcc8e592db49f799b1a6ac3a3e4b77aecd5f45b
  • SPFv=spf1 include:_spf.protonmail.ch include:sparkpostmail.com include:emsd1.com a:w010.vx.ativ.mooieserver.nl ip4:92.63.163.52 ~all
  • google-site-verification=g2bf_4emmydB8jt8sDfEyBVdLXLYSZh-5m8lntA4BMo
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