Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tcbuen.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-03 18:25:29 UTC · ↺ Refresh
MX Hostnames
- alt1.aspmx.l.google.com
- aspmx2.googlemail.com
- mxa.mailgun.org
- alt2.aspmx.l.google.com
- aspmx.l.google.com
- aspmx3.googlemail.com
- mxb.mailgun.org
MX Priorities
- aspmx2.googlemail.com: 10
- mxa.mailgun.org: 10
- mxb.mailgun.org: 10
- aspmx3.googlemail.com: 10
- alt2.aspmx.l.google.com: 5
- aspmx.l.google.com: 1
- alt1.aspmx.l.google.com: 5
A / AAAA Records
- 181.54.161.113 ↩ static-ip-181540161113.cable.net.co
Mail Server IPs
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 34.160.63.108 ↩ 108.63.160.34.bc.googleusercontent.com
- 34.149.236.64 ↩ 64.236.149.34.bc.googleusercontent.com
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1b ↩ dj-in-f27.1e100.net
- 172.253.116.26 ↩ dj-in-f26.1e100.net
SOA Record
Raw SOA
ns20.digicertdns.com dns.digicertdns.com 2009013998 43200 3600 1209600 180
Primary NS (mname)
ns20.digicertdns.com
Admin Email (rname)
dns@digicertdns.com
Serial
2009013998
Refresh
43200s
Retry
3600s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
ns13.dnsmadeeasy.com
ns15.dnsmadeeasy.com
ns14.dnsmadeeasy.com
ns12.dnsmadeeasy.com
ns10.dnsmadeeasy.com
ns11.dnsmadeeasy.com
SPF Record
✓ Strict (-all)
v=spf1 +ip4:190.145.207.192/28 +ip4:186.113.26.72/29 +include:_spf.google.com include:mailgun.org -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; sp=reject; adkim=s; aspf=s; pct=100; rua=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
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
2 records- SPFv=spf1 +ip4:190.145.207.192/28 +ip4:186.113.26.72/29 +include:_spf.google.com include:mailgun.org -all
- _ao54so671pyevki1v1ubzdtse267y48
Full email verification for tcbuen.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits