proton.ch

Valid Email Server
Domain Lookup › proton.ch

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
proton.ch
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-04-01 06:20:12 UTC · ↺ Refresh

MX Hostnames

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

MX Priorities

  • mail.protonmail.ch: 10
  • mailsec.protonmail.ch: 20
  • mail.proton.ch: 30

A / AAAA Records

  • 185.70.42.21 ↩ 185-70-42-21.protonmail.ch

Mail Server IPs

  • 185.205.70.128 ↩ mail.protonmail.ch
  • 176.119.200.128 ↩ mail.protonmail.ch
  • 185.70.42.128 ↩ mail.protonmail.ch
  • 176.119.200.129 ↩ mailsec.protonmail.ch
  • 185.70.42.129 ↩ mailsec.protonmail.ch
  • 185.205.70.129 ↩ mailsec.protonmail.ch
  • 135.125.90.216 (no PTR)

SOA Record

Raw SOA ns1.proton.ch support.proton.ch 2026030346 1200 144 1814400 7200
Primary NS (mname)
ns1.proton.ch
Admin Email (rname)
support@proton.ch
Serial
2026030346
Refresh
1200s
Retry
144s
Expire
1814400s
Minimum TTL
7200s

Nameservers (NS)

ns2.proton.ch
ns1.proton.ch
ns3.proton.ch

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.protonmail.ch ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 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

10 records
  • apple-domain-verification=XEnNDXqXsBGyRgMR
  • protonmail-verification=5478e5016946cef0e371955669ccddaacc710fc1
  • google-site-verification=lGjSVWmDvwGcx0k7NEdx_CX9rTRBiC5SxnGDvuXuO_I
  • atlassian-sending-domain-verification=fee9ed55-f377-457a-91b7-86f1532b3e59
  • MS=ms46145857
  • atlassian-domain-verification=E5ZWgwlH3N3k8RjY0OncTFIL4cZxYs0WbJvKz7nRXFdRdj48r0lkXp4h6VGWSQNj
  • MS=ms42725319
  • SPFv=spf1 include:_spf.protonmail.ch ~all
  • google-site-verification=Ur1xIFOnvPdOX7kwnNjwLpdRkDUYxieCdONNqGT2y4I
  • google-site-verification=fogAtsYW9R5Xzl9dhtLS1IO-i31sybKERAOr586HDLE
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