Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
featureos.app
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 03:49:02 UTC · ↺ Refresh
MX Hostnames
- alt4.aspmx.l.google.com
- mail.m.featureos.app
- alt1.aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt2.aspmx.l.google.com
- aspmx.l.google.com
MX Priorities
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
- mail.m.featureos.app: 10
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
A / AAAA Records
- 172.67.75.197 (no PTR)
- 104.26.1.153
- 104.26.0.153
- 2606:4700:20::681a:199
- 2606:4700:20::ac43:4bc5
- 2606:4700:20::681a:99
Mail Server IPs
- 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
- 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-f26.1e100.net
- 5.78.105.0 ↩ static.0.105.78.5.clients.your-server.de
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 172.253.116.26 ↩ dj-in-f26.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
SOA Record
Raw SOA
liberty.ns.cloudflare.com dns.cloudflare.com 2399818286 10000 2400 604800 1800
Primary NS (mname)
liberty.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399818286
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
yew.ns.cloudflare.com
liberty.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 +a +mx +ip4:5.78.105.0 -all
📊 DNS lookups: 2/10
✓ 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
✓ 13 found
google._domainkey
selector1._domainkey
selector2._domainkey
default._domainkey
mail._domainkey
dkim._domainkey
k1._domainkey
s1._domainkey
s2._domainkey
zoho._domainkey
sendgrid._domainkey
mxvault._domainkey
amazonses._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
6 records- brevo-code:1bd779c066bbe4c285ff7737556031c5
- google-site-verification=3ZO3t0WW3Djb7O0yZ7gbEtas-Lb8aN4YGNAN1vx9Z9A
- openai-domain-verification=dv-nmAS1mZ18mKLsca8Z1GBchXf
- SPFv=spf1 +a +mx +ip4:5.78.105.0 -all
- SPFv=spf1 -all
- apple-domain-verification=EvPIVegUsU3YTUqax9zfUYZpXakeZuqheqgpD80v4Bg
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 featureos.app
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits