Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dslextreme.com
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 16:18:58 UTC · ↺ Refresh
MX Hostnames
- dslextreme-com.mx.av-mx.com
MX Priorities
- dslextreme-com.mx.av-mx.com: 10
A / AAAA Records
- 104.17.156.99 (no PTR)
- 104.17.155.99 (no PTR)
Mail Server IPs
- 150.136.204.204 ↩ mx.nrtc.syn-alias.com
SOA Record
Raw SOA
ns11.constellix.com dns.constellix.com 2015010173 43200 3600 1209600 180
Primary NS (mname)
ns11.constellix.com
Admin Email (rname)
dns@constellix.com
Serial
2015010173
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns11.constellix.com
ns21.constellix.com
ns31.constellix.com
ns41.constellix.net
ns51.constellix.net
ns61.constellix.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:66.51.199.0/25 ip4:66.51.205.0/24 ip4:206.15.128.0/18 include:spf.constantcontact.com include:spf1.neonova.net -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
✓ 1 found
s1._domainkey
✓ Public key: 64 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:66.51.199.0/25 ip4:66.51.205.0/24 ip4:206.15.128.0/18 include:spf.constantcontact.com include:spf1.neonova.net -all
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