MXSentin
Free Tools
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Resources
Free Tools
Email Authentication
SPF Checker
DMARC Validator
DKIM Checker
BIMI Checker
MTA-STS Checker
Generators & Analyzers
SPF Generator
DMARC Generator
DKIM Generator
Header Analyzer
DMARC Analyzer
DNS & Domains
MX Checker
DNS Health
PTR Lookup
WHOIS Lookup
Network & Security
Blacklist Monitor
SMTP Diagnostics
Port Tester
TLS Cert Checker
Port Tester
Test any server port for reachability, latency, and TLS encryption status.
Server Hostname or IP
Port
Test Port