Domain Overview
DNS: ✓ 1mo ago
Checker: ✓ 1mo ago
columbus.edu.co
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-06 15:02:46 UTC · ↺ Refresh
MX Hostnames
- alt1.aspmx.l.google.com
- aspmx3.googlemail.com
- alt2.aspmx.l.google.com
- aspmx.l.google.com
- aspmx2.googlemail.com
MX Priorities
- aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 20
- alt2.aspmx.l.google.com: 20
- aspmx2.googlemail.com: 30
- aspmx3.googlemail.com: 30
A / AAAA Records
- 34.174.207.239 ↩ 239.207.174.34.bc.googleusercontent.com
Mail Server IPs
- 142.251.163.26 ↩ wv-in-f26.1e100.net
- 2607:f8b0:4004:c27::1b ↩ yuiadsk-in-f27.1e100.net
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1a (no PTR)
- 172.253.116.26 ↩ dj-in-f26.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
SOA Record
Raw SOA
isaac.ns.cloudflare.com dns.cloudflare.com 2400905731 10000 2400 604800 1800
Primary NS (mname)
isaac.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2400905731
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
isaac.ns.cloudflare.com
leah.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.mlsend.com include:_spf.mailersend.net a:spf.constantcontact.com include:_spf.google.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; pct=100
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 216 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
5 records- have-i-been-pwned-verification=8a3962c245690a1026f1ab573b1eec62
- have-i-been-pwned-verification=dweb_0jxn0dpa3t6ua6ewmt8tx3pb
- SPFv=spf1 include:_spf.mlsend.com include:_spf.mailersend.net a:spf.constantcontact.com include:_spf.google.com ~all
- MS=231EC6B1977A7702A6DB86BD5D71FC082B99708E
- apple-domain-verification=vLVHd1WRnK6wy7yS
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