Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
crb-express.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 18:21:12 UTC · ↺ Refresh
MX Hostnames
- mx03.secure-mailgate.com
- mx04.secure-mailgate.com
MX Priorities
- mx03.secure-mailgate.com: 10
- mx04.secure-mailgate.com: 10
A / AAAA Records
- 89.22.101.210 ↩ relay.crb-express.com
Mail Server IPs
- 46.243.88.174 ↩ node03.secure-mailgate.com
- 46.243.88.176 ↩ node04.secure-mailgate.com
- 46.243.88.177 ↩ node04.secure-mailgate.com
- 46.243.88.175 ↩ node03.secure-mailgate.com
SOA Record
Raw SOA
cns1.alfahosting.info hostmaster.alfahosting.de 2026022302 28800 7200 604800 10800
Primary NS (mname)
cns1.alfahosting.info
Admin Email (rname)
hostmaster@alfahosting.de
Serial
2026022302
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
10800s
Nameservers (NS)
cns3.alfahosting.info
cns2.alfahosting.info
cns1.alfahosting.info
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:5.44.105.190 ip4:82.198.222.250 ip4:89.22.101.210 include:secure-mailgate.com include:_spf.google.com a mx ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=none; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: mail
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- google-site-verification=PYpWaqWgM9HCNw_ML56XcEShSoCWr2OMeh4odWi9Oc4
- SPFv=spf1 ip4:5.44.105.190 ip4:82.198.222.250 ip4:89.22.101.210 include:secure-mailgate.com include:_spf.google.com a mx ~all
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