Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mrcy.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 15:08:31 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-1.mimecast.com
- us-smtp-inbound-2.mimecast.com
MX Priorities
- us-smtp-inbound-2.mimecast.com: 10
- us-smtp-inbound-1.mimecast.com: 10
A / AAAA Records
- 3.138.110.72 ↩ ec2-3-138-110-72.us-east-2.compute.amazonaws.com
Mail Server IPs
- 170.10.132.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
extma1.mrcy.com hostmaster.mrcy.com 2026031000 1200 300 1209600 600
Primary NS (mname)
extma1.mrcy.com
Admin Email (rname)
hostmaster@mrcy.com
Serial
2026031000
Refresh
1200s
Retry
300s
Expire
1209600s
Minimum TTL
600s
Nameservers (NS)
ns2.mrcy.com
ns1.mrcy.com
ns4.mrcy.com
extma1.mrcy.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:192.148.197.0/24 include:us._netblocks.mimecast.com include:de._netblocks.mimecast.com include:mktomail.com ip4:170.153.66.12/30 ip4:208.81.145.88/31 include:_spf.salesforce.com include:spf.protection.outlook.com -all
📊 DNS lookups: 5/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; ruf=mailto:[email protected]; rua=mailto:[email protected]; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — 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
5 records- duo_sso_verification=V5Nj56PUVBAwvFwvqp1zPY5eDIYpjL7BhHNdllGzjRTqCKFf95JFgsGkoIYb9BjF
- apple-domain-verification=RVleBI8fZDXJt5qu
- SPFv=spf1 ip4:192.148.197.0/24 include:us._netblocks.mimecast.com include:de._netblocks.mimecast.com include:mktomail.com ip4:170.153.66.12/30 ip4:208.81.145.88/31 include:_spf.salesforce.com include:spf.protection.outlook.com -all
- MS=ms99352319
- facebook-domain-verification=rd3ocd1ec3hlb904ohditbkutcirao
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