Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
michaelkirschbaum.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 07:44:42 UTC · ↺ Refresh
MX Hostnames
- mailsec.protonmail.ch
- mail.protonmail.ch
MX Priorities
- mail.protonmail.ch: 10
- mailsec.protonmail.ch: 20
A / AAAA Records
- 185.199.111.153 ↩ cdn-185-199-111-153.github.com
- 185.199.108.153 ↩ cdn-185-199-108-153.github.com
- 185.199.109.153 ↩ cdn-185-199-109-153.github.com
- 185.199.110.153 ↩ cdn-185-199-110-153.github.com
Mail Server IPs
- 185.70.42.128 ↩ mail.protonmail.ch
- 176.119.200.128 ↩ mail.protonmail.ch
- 185.205.70.128 ↩ mail.protonmail.ch
- 185.70.42.129 ↩ mailsec.protonmail.ch
- 176.119.200.129 ↩ mailsec.protonmail.ch
- 185.205.70.129 ↩ mailsec.protonmail.ch
SOA Record
Raw SOA
ns27.domaincontrol.com dns.jomax.net 2025041502 28800 7200 604800 600
Primary NS (mname)
ns27.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2025041502
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns27.domaincontrol.com
ns28.domaincontrol.com
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
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✗ None detectedNo 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
2 records- protonmail-verification=d4856423663051e65706ace41ffcde1adcbbca64
- SPFv=spf1 include:_spf.protonmail.ch ~all
Full email verification for michaelkirschbaum.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits