Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
isotope.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 00:09:29 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
No priority data.
A / AAAA Records
- 151.101.193.91
- 151.101.65.91
- 151.101.1.91
- 151.101.129.91
Mail Server IPs
No IPs resolved.
SOA Record
No SOA record found.
Nameservers (NS)
ns4.dnsmadeeasy.com
ns3.dnsmadeeasy.com
ns0.dnsmadeeasy.com
ns2.dnsmadeeasy.com
ns1.dnsmadeeasy.com
SPF Record
✓ Strict (-all)
v=spf1 include:_s00259635.autospf.email -all
📊 DNS lookups: 1/10
✓ 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
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._domainkey
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
5 records- Target 0ed1fe018aa32997597f3243f9ad415e2778c0e78b
- 06Q7HdrIZvQVmywRkVnzWHJW2OY/IKSlQZM6bjxgYeO4EQuW5uA7v5YnfCDP/nkMdCZWfOI3mbrtDxe/MSFEhA==
- SPFv=spf1 include:_s00259635.autospf.email -all
- google-site-verification=9PHklN6KJC5Une_oMDMd_4L6ErVNqsa_lUFcdHPUQkI
- MS=ms18407789
Full email verification for isotope.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits