Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
bisd303.org
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 06:30:17 UTC · ↺ Refresh
MX Hostnames
- alt4.aspmx.l.google.com
- aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt1.aspmx.l.google.com
- alt2.aspmx.l.google.com
MX Priorities
- alt4.aspmx.l.google.com: 10
- alt3.aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
- alt2.aspmx.l.google.com: 5
A / AAAA Records
- 18.233.124.95
- 54.221.139.169
Mail Server IPs
- 173.194.76.27 ↩ ws-in-f27.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-x1a.1e100.net
- 192.178.223.27 ↩ yulhrs-in-f27.1e100.net
- 2a00:1450:4009:c0f::1b ↩ yulhrs-in-f27.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.62.26 ↩ bc-in-f26.1e100.net
- 2607:f8b0:4004:c27::1a ↩ yuiadsk-in-f26.1e100.net
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
SOA Record
Raw SOA
ns53.worldnic.com namehost.worldnic.com 125090816 10800 3600 604800 3600
Primary NS (mname)
ns53.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
125090816
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns54.worldnic.com
ns53.worldnic.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:e2ma.net include:_spf.psm.knowbe4.com include:spf.schoolwires.net include:_spf.bbnotify.net ip4:152.157.6.20 ip4:164.116.112.26 ip4:50.223.178.203 ip4:50.223.178.208 ip4:50.223.178.201 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
13 records- SPFv=spf1 include:_spf.google.com include:e2ma.net include:_spf.psm.knowbe4.com include:spf.schoolwires.net include:_spf.bbnotify.net ip4:152.157.6.20 ip4:164.116.112.26 ip4:50.223.178.203 ip4:50.223.178.208 ip4:50.223.178.201 ip4:23.21.109.197 ip4:23.21.109.212 ip4:147.160.167.0/26 ~all
- apple-domain-verification=qIFjIBJ88u3GvU0B
- adobe-idp-site-verification=cc3fb784d0a35f75cbbb673141fc32db2c3ff443f3b6f2d30ff56582b87c6e88
- e2ma-verification=86dcb
- e2ma-verification=9ufcb
- MS=F58CCDA6788D07223DE0424BCE9365CE86354231
- e2ma-verification=7ufcb
- google-site-verification=ekcY4VOcsn6LL_siTtG98qwa7y_hFY8Nkj4vAAexR4w
- e2ma-verification=dvfcb
- e2ma-verification=76dcb
- e2ma-verification=bvfcb
- e2ma-verification=avfcb
- autodesk-domain-verification=a1TIJiRyEDB_QfKzs8UQ
Full email verification for bisd303.org
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits