promenaroku.cz

Valid Email Server

Domain Overview

DNS: โœ“ 2mo ago Checker: โœ“ 2mo ago
promenaroku.cz
Yes
โœ“ Yes
Unknown
No
No
โš  Yes
No
No

Checked via [email protected] ยท 2026-03-17 21:12:57 UTC ยท โ†บ Refresh

MX Hostnames

  • mx10.websupport.cz
  • mx20.websupport.cz

MX Priorities

  • mx10.websupport.cz: 10
  • mx20.websupport.cz: 20

A / AAAA Records

  • 104.21.54.242 (no PTR)
  • 172.67.169.165 (no PTR)
  • 2606:4700:3032::ac43:a9a5 (no PTR)
  • 2606:4700:3037::6815:36f2 (no PTR)

Mail Server IPs

  • 45.13.137.103 โ†ฉ m1-u5-mx.websupport.cz
  • 2a00:4b40:aaaa:2101:45:13:137:103 โ†ฉ mx10.websupport.cz
  • 45.13.137.104 โ†ฉ m1-u6-mx.websupport.cz
  • 2a00:4b40:aaaa:2101:45:13:137:104 โ†ฉ mx20.websupport.cz

SOA Record

Raw SOA kay.ns.cloudflare.com dns.cloudflare.com 2399054269 10000 2400 604800 1800
Primary NS (mname)
kay.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399054269
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

mark.ns.cloudflare.com
kay.ns.cloudflare.com

SPF Record

โœ“ Soft Fail (~all)
v=spf1 +ip4:87.236.195.135 +ip4:87.236.195.134 +include:promenaroku.cz ~all
๐Ÿ“Š DNS lookups: 1/10
~ Soft fail (~all) โ€” moderate enforcement

DMARC Record

โœ— p=none
v=DMARC1; p=none; rua=mailto:[email protected]; fo=1; ri=86400;
โš  p=none โ€” monitoring only, no enforcement
๐Ÿ“‹ SPF alignment: Relaxed ยท DKIM alignment: Relaxed
๐Ÿ“ง Reports โ†’ mailto:[email protected]

DKIM Selectors

โœ— None detected

No DKIM records found for common selectors โ€” 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
  • SPFv=spf1 +ip4:87.236.195.135 +ip4:87.236.195.134 +include:promenaroku.cz ~all
  • google-site-verification=3Rnlis3n2cvCRF2KotF2bQFwKMCR1slufMAh5vd1lME
Free ยท No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts โ€” unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code ยท Works on any site
See demo & docs
Deep verification
Full email verification for promenaroku.cz

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits