Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mcmtelecom.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 00:36:21 UTC · ↺ Refresh
MX Hostnames
- mustang.mcmtelecom.com.br
MX Priorities
- mustang.mcmtelecom.com.br: 0
A / AAAA Records
- 200.142.149.52 ↩ shelby.mcmtelecom.com.br
Mail Server IPs
- 200.142.149.53 ↩ mustang.mcmtelecom.com.br
SOA Record
Raw SOA
dns.mcmtelecom.com.br jorge.mcmtelecom.com.br 2024032503 7200 1200 1209600 38400
Primary NS (mname)
dns.mcmtelecom.com.br
Admin Email (rname)
jorge@mcmtelecom.com.br
Serial
2024032503
Refresh
7200s
Retry
1200s
Expire
1209600s
Minimum TTL
38400s
Nameservers (NS)
dns.mcmtelecom.com.br
mailgw.mcmtelecom.com.br
SPF Record
✓ Strict (-all)
v=spf1 mx a ip4:10.10.50.0/24 ip6:2804:178::/64 ip6:2804:178:0:ca5a::/64 ip4:200.142.149.0/26 include:mcmtelecom.com.br include:mailgw.mcmtelecom.com.br -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;sp=quarantine;adkim=r;aspf=r
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 392 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
1 record- SPFv=spf1 mx a ip4:10.10.50.0/24 ip6:2804:178::/64 ip6:2804:178:0:ca5a::/64 ip4:200.142.149.0/26 include:mcmtelecom.com.br include:mailgw.mcmtelecom.com.br -all
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