Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
jakob-bau.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 01:59:23 UTC · ↺ Refresh
MX Hostnames
- mail.jakob-bau.com
MX Priorities
- mail.jakob-bau.com: 5
A / AAAA Records
- 104.21.67.40 (no PTR)
- 172.67.211.247 (no PTR)
- 2606:4700:3032::ac43:d3f7 (no PTR)
- 2606:4700:3032::6815:4328 (no PTR)
Mail Server IPs
- 159.69.40.28 ↩ mail.blueface.dev
- 2a01:4f8:1c1c:c221::1 ↩ mail.blueface.dev
SOA Record
Raw SOA
dylan.ns.cloudflare.com dns.cloudflare.com 2400612879 10000 2400 604800 1800
Primary NS (mname)
dylan.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400612879
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
tiffany.ns.cloudflare.com
dylan.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:159.69.40.28 ip6:2a01:4f8:1c1c:c221::1 mx -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict 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
✓ 1 found
dkim._domainkey
✓ Public key: 736 chars (valid)
✓ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:159.69.40.28 ip6:2a01:4f8:1c1c:c221::1 mx -all
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
See demo & docs
Deep verification
Full email verification for jakob-bau.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits