Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
blockinstitute.org
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 03:04:59 UTC · ↺ Refresh
MX Hostnames
- blockinstitute-org.mail.eo.outlook.com
MX Priorities
- blockinstitute-org.mail.eo.outlook.com: 10
A / AAAA Records
- 35.224.238.192 ↩ 192.238.224.35.bc.googleusercontent.com
Mail Server IPs
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 2a01:111:f403:f804::1 ↩ mail-co1pr05cu00301.inbound.protection.outlook.com
- 2a01:111:f403:f902:: ↩ mail-bl2pr04cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
- 2a01:111:f403:c902::14 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
SOA Record
Raw SOA
ns81.worldnic.com namehost.worldnic.com 125121711 10800 3600 604800 3600
Primary NS (mname)
ns81.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125121711
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns81.worldnic.com
ns82.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:64.61.13.117 ip4:64.61.13.116 ip4:54.149.177.136 ip4:64.61.13.114 include:spf.protection.outlook.com include:_spf.psm.knowbe4.com include:_spf.intacct.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; fo=1
~ 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
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
11 records- F4kGeYpK6ww1JaxclA+YQ1PgLTgagecOTQBY4ENtOiRb92vI/43u0VNGi3oQbTkzMO2XxrXy63+OuYVmrLoxJA==
- apple-domain-verification=AjoL4rizgw76Glz0
- e0g7ha5s1gnmqjfqch6tb11se5
- YlKbvWjdxEgLNcdvmFBwfjxmALJYgw1MSO4pZkfnGSmZxP57a6Tebd0U1Gij/I2Nrq48OllwYt48TvmrSbK+9w==
- 8lge0rvohqik42cm3b35rhjdi3
- 6qh352fr5jt1pcs1cmin6dbep6
- google-site-verification=opR_ma2aY68zgHfSJa8GvB4UxnJHKLb-Tarqb21Rtts
- SPFv=spf1 ip4:64.61.13.117 ip4:64.61.13.116 ip4:54.149.177.136 ip4:64.61.13.114 include:spf.protection.outlook.com include:_spf.psm.knowbe4.com include:_spf.intacct.com -all
- MS=BA4F636BBF0F390F24EF79EFF76A938C70522D24
- apple-domain-verification=Zsqv9nAwCvo4fss9
- 4ujncmu0nhvvjbfekbp02i6enj
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for blockinstitute.org
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits