Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
byseven.com.br
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-01 03:53:09 UTC · ↺ Refresh
MX Hostnames
- byseven-com-br.mail.protection.outlook.com
MX Priorities
- byseven-com-br.mail.protection.outlook.com: 0
A / AAAA Records
- 23.236.62.147 ↩ 147.62.236.23.bc.googleusercontent.com
Mail Server IPs
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 52.101.41.54 ↩ mail-sj2pr05cu00506.inbound.protection.outlook.com
- 52.101.194.0 ↩ mail-ch5pr02cu00200.inbound.protection.outlook.com
- 52.101.194.17 ↩ mail-ch5pr02cu00401.inbound.protection.outlook.com
- 2a01:111:f403:f913::1 ↩ mail-cy5pr05cu00101.inbound.protection.outlook.com
- 2a01:111:f403:c91d::a ↩ mail-co1pr21cu00202.inbound.protection.outlook.com
- 2a01:111:f403:f90d::1 ↩ mail-sn1pr0501cu00301.inbound.protection.outlook.com
- 2a01:111:f403:c927::1 ↩ mail-bn8pr05cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
ns1-07.azure-dns.com azuredns-hostmaster.microsoft.com 1 300 300 300 300
Primary NS (mname)
ns1-07.azure-dns.com
Admin Email (rname)
azuredns-hostmaster@microsoft.com
Serial
1
Refresh
300s
Retry
300s
Expire
300s
Minimum TTL
300s
Nameservers (NS)
ns3-07.azure-dns.org
ns4-07.azure-dns.info
ns1-07.azure-dns.com
ns2-07.azure-dns.net
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:38.250.80.128/28 ip4:143.0.123.0/28 ip4:200.233.220.204 ip6:2603:1000::/24 include:spf.protection.outlook.com include:rp.oracleemaildelivery.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1; pct=100
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 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
3 records- SPFv=spf1 mx ip4:38.250.80.128/28 ip4:143.0.123.0/28 ip4:200.233.220.204 ip6:2603:1000::/24 include:spf.protection.outlook.com include:rp.oracleemaildelivery.com -all
- "MS=ms63123302"
- trend-micro-v1-domain-verification.64bf057321cff4b8f1528d6cc7d30f9c=6a8aa709-0215-4ef0-90ee-bdee79663d9c
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 byseven.com.br
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits