Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
cortlanddentalgroup.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 02:04:04 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-1.mimecast.com: 10
- us-smtp-inbound-2.mimecast.com: 10
A / AAAA Records
- 162.216.41.247 (no PTR)
Mail Server IPs
- 170.10.128.221 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
ns37.worldnic.com namehost.worldnic.com 125120113 10800 3600 604800 3600
Primary NS (mname)
ns37.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125120113
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns38.worldnic.com
ns37.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 include:us._netblocks.mimecast.com ip4:207.126.144.0/20 ip4:64.18.0.0/20 ip4:72.42.253.0/24 include:cust-spf.exacttarget.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
⚠ Public key (p=) missing in DKIM record for selector google.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- _globalsign-domain-verification=0ipF2grbEVc1R39BQ1EwPTcUtlpV6oVfzgC-J4CSUP
- SPFv=spf1 include:us._netblocks.mimecast.com ip4:207.126.144.0/20 ip4:64.18.0.0/20 ip4:72.42.253.0/24 include:cust-spf.exacttarget.com -all
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