Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
blockbyblock.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 15:39:55 UTC · ↺ Refresh
MX Hostnames
- mx1-us.emailsecurity.app
- mx2-us.emailsecurity.app
MX Priorities
- mx2-us.emailsecurity.app: 20
- mx1-us.emailsecurity.app: 10
A / AAAA Records
- 66.33.200.248 ↩ ds14863.dreamservers.com
Mail Server IPs
- 172.212.4.33 ↩ mx1-us.emailsecurity.app
- 40.121.188.167 ↩ mx1-us.emailsecurity.app
SOA Record
Raw SOA
ns0.dnsmadeeasy.com dns.dnsmadeeasy.com 2008010543 43200 3600 1209600 180
Primary NS (mname)
ns0.dnsmadeeasy.com
Admin Email (rname)
dns@dnsmadeeasy.com
Serial
2008010543
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns1.dnsmadeeasy.com
ns4.dnsmadeeasy.com
ns2.dnsmadeeasy.com
ns0.dnsmadeeasy.com
ns3.dnsmadeeasy.com
SPF Record
✓ Strict (-all)
v=spf1 a mx ip4:4.59.203.64/27 include:spf.protection.outlook.com ip4:173.162.18.177/28 include:edgepilot.com include:spf1.emailsecurity.app -all
📊 DNS lookups: 5/10
✓ 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
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
10 records- sbv25ed5gmbvo18e2p2m9nion8
- 9UNZWWVL1WK49MIV0QD3LNBSER5NZ64C7KUWCZU0
- Account Engagement emails pass SPF automatically, but we recommend setting it up as a best practice.
- SPFv=spf1 a mx ip4:4.59.203.64/27 include:spf.protection.outlook.com ip4:173.162.18.177/28 include:edgepilot.com include:spf1.emailsecurity.app -all
- d0ehrggputgthn1nb5havo2v3k
- sending_domain200162=4b4988e2b15e8c00d77c69b60f083ea0655c9bb8108aa64e2db8d243f7a69f93
- apple-domain-verification=vNzCgmMOIYnSyfP2
- mceg2tiav57gd92ekcct0te5s9
- MS=ms76071142
- vlo3lmb4ja1pqii29l7k2tl4jn
Full email verification for blockbyblock.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits