Domain Overview
DNS: ✓ just now
Checker: ✓ just now
ctu.edu.gr
Disposable
✓ Yes
Cloudflare
⚠ Yes
No
⚠ Yes
⚠ Yes
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-06-02 00:12:09 UTC · ↺ Refresh
MX Hostnames
- route1.mx.cloudflare.net
- route2.mx.cloudflare.net
- route3.mx.cloudflare.net
MX Priorities
- route3.mx.cloudflare.net: 38
- route1.mx.cloudflare.net: 43
- route2.mx.cloudflare.net: 71
A / AAAA Records
- 172.67.142.178
- 104.21.46.223
- 2606:4700:3032::6815:2edf
- 2606:4700:3035::ac43:8eb2
Mail Server IPs
- 162.159.205.23 ↩ route3.mx.cloudflare.net
- 162.159.205.24 ↩ route3.mx.cloudflare.net
- 162.159.205.25 ↩ route3.mx.cloudflare.net
- 2606:4700:f5::11 ↩ route3.mx.cloudflare.net
- 2606:4700:f5::13 ↩ route3.mx.cloudflare.net
- 2606:4700:f5::12 ↩ route3.mx.cloudflare.net
- 162.159.205.12 ↩ route1.mx.cloudflare.net
- 162.159.205.11 ↩ route1.mx.cloudflare.net
- 162.159.205.13 ↩ route1.mx.cloudflare.net
- 2606:4700:f5::b ↩ route1.mx.cloudflare.net
- 2606:4700:f5::c
- 2606:4700:f5::d
- 162.159.205.18
- 162.159.205.17
- 162.159.205.19
- 2606:4700:f5::f
- 2606:4700:f5::10
- 2606:4700:f5::e
SOA Record
Raw SOA
earl.ns.cloudflare.com dns.cloudflare.com 2404577932 10000 2400 604800 1800
Primary NS (mname)
earl.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2404577932
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
earl.ns.cloudflare.com
zita.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.mx.cloudflare.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: reject
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
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 include:_spf.mx.cloudflare.net -all
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