Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rnv-online.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 15:16:45 UTC · ↺ Refresh
MX Hostnames
- mx2.rnv-online.de
- mx.rnv-online.de
MX Priorities
- mx.rnv-online.de: 10
- mx2.rnv-online.de: 40
A / AAAA Records
- 157.97.108.93 ↩ rnv01.ueberbit.de
Mail Server IPs
- 212.65.25.177 ↩ mx.rnv-online.de
- 212.65.25.190 ↩ mx2.rnv-online.de
SOA Record
Raw SOA
a.ns14.net admins.ueberbit.de 2026011511 43200 7200 1209600 86400
Primary NS (mname)
a.ns14.net
Admin Email (rname)
admins@ueberbit.de
Serial
2026011511
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
a.ns14.net
b.ns14.net
c.ns14.net
d.ns14.net
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:185.5.24.115 ip4:185.5.24.116 a:rnv-online.managed-otrs.com include:spf.crsend.com include:spf.flowmailer.net include:spf.protection.outlook.com -all
📊 DNS lookups: 6/10
✓ 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
✗ 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
11 records- A0PxsAs5K8z1E1uNKK2gN6OoPgFpINFdXd+u5Gy9AcZDdxCuTOZYUbSGZSJlnhCFaGOIRLNZjrRjelI8wXXj7w==
- d365mktkey=xxqMUHElxUM8i7asbCz2YvU3bsNBs2qvPGMTRQ4xd0Ux
- SPFv=spf1 a mx ip4:185.5.24.115 ip4:185.5.24.116 a:rnv-online.managed-otrs.com include:spf.crsend.com include:spf.flowmailer.net include:spf.protection.outlook.com -all
- facebook-domain-verification=2ku6m5hv2rr7rt1xqkezvjwpv31n86
- MS=ms40314010
- MS=ms24930706
- d365mktkey=iql7INwO1qYMUfXxsub79xJphcYthUdcYxngh9j1rfcx
- apple-domain-verification=X4V8bauXaZD3hQ4q
- d365mktkey=aI9DXnxeZJ332sqQDMZa971rwXY3LbOJUNaPWWgSRjgx
- mindmanager-verification=0fa432b286df286441accd61f07617234f7a300f398a018744270e05f90c9c02
- d365mktkey=96BcUxqHy8hJePJ2yKWldJ3QdVEkNV33XVqGRGylg1Yx
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 rnv-online.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits