Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
iesb.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-21 01:11:04 UTC · ↺ Refresh
MX Hostnames
- smtp.iesb.br
MX Priorities
- smtp.iesb.br: 10
A / AAAA Records
- 34.195.191.172 ↩ ec2-34-195-191-172.compute-1.amazonaws.com
Mail Server IPs
- 186.251.61.42 ↩ smtp.iesb.br
SOA Record
Raw SOA
dns3.iesb.br rede.iesb.br 2025112619 3600 900 1209600 3600
Primary NS (mname)
dns3.iesb.br
Admin Email (rname)
rede@iesb.br
Serial
2025112619
Refresh
3600s
Retry
900s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
dns3.iesb.br
dns4.iesb.br
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:186.251.61.42/32 include:sendgrid.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]; ruf=mailto:[email protected]; rf=afrf ; sp=reject; ri=86400 ; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 3 found
default._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
8 records- google-site-verification=EvCSFWMCBihFrny6rDvtMA4TotxL5rTwI5-BX9AoRZI
- google-site-verification=l7r7zT6Jf6GaIicSPRa4Joli12IVXAvVZdItBYokgfg
- _globalsign-domain-verification=8QnZuqzPqXtZ05riwzsrOr3QzNwxfEWmFGlCw4Sag5
- MS=ms66707046
- MS=8B9E9646B93A1B85CC848E581EB33796C31D4E43
- SPFv=spf1 mx ip4:186.251.61.42/32 include:sendgrid.net -all
- facebook-domain-verification=84bjctlg7s6faubrn7yz15rjo4tkqz
- adobe-idp-site-verification=1b5c22e0-2049-4831-86a9-dc6c6d957f5a
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