Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
bu.com.co
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-01 04:42:54 UTC · ↺ Refresh
MX Hostnames
- bu-com-co.mail.protection.outlook.com
MX Priorities
- bu-com-co.mail.protection.outlook.com: 0
A / AAAA Records
- 52.6.181.253 ↩ ec2-52-6-181-253.compute-1.amazonaws.com
Mail Server IPs
- 52.101.50.7 ↩ mail-co1pr21cu00207.inbound.protection.outlook.com
- 52.101.41.6 ↩ mail-sj0pr03cu01406.inbound.protection.outlook.com
- 52.101.8.46 ↩ mail-dm6pr05cu00406.inbound.protection.outlook.com
- 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
- 2a01:111:f403:f90a:: ↩ mail-bn6pr02cu00300.inbound.protection.outlook.com
- 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c902::5 ↩ mail-sj2pr05cu00505.inbound.protection.outlook.com
SOA Record
Raw SOA
ns20.columbus-networks.com co-ip.cwc.com 2018101404 10800 3600 604800 38400
Primary NS (mname)
ns20.columbus-networks.com
Admin Email (rname)
co-ip@cwc.com
Serial
2018101404
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
38400s
Nameservers (NS)
ns22.columbus-networks.com
ns1.bdm.microsoftonline.com
ns20.columbus-networks.com
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:190.131.245.101 include:spf.protection.outlook.com include:spf.mandrillapp.com include:_spf.google.com include:_spf.embluemail.com include:spf.sendinblue.com include:spf-us.emailsignatures365.com ~all
📊 DNS lookups: 6/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject;rua=mailto:[email protected];ruf=mailto:[email protected]; sp=reject; aspf=s
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
mail._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 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
5 records- SPFv=spf1 ip4:190.131.245.101 include:spf.protection.outlook.com include:spf.mandrillapp.com include:_spf.google.com include:_spf.embluemail.com include:spf.sendinblue.com include:spf-us.emailsignatures365.com ~all
- VKpE8wBD83MUhbIYjQaVXXdLFW0wiWdKGl8njB3x+dowAd44kP6QQWGV6d23aeINvpdTZUnGsEuWm8HTBXb0uA==
- smartfense-domain-verification=Db9eNLxdYP5tFvySjdphXDKli7UO5BjryXCim15YtdsKtAkZ
- Foxit-domain-verification=454eef962a1e6ba7ac0a89b3828cc1ed
- Sendinblue-code:6606b053a71b13c57a219bcd852b13f7
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