SMTP Tools

Profile your SMTP lifecycle in real-time. Execute a live state machine test to track command-by-command latency, detect greylisting, and debug routing delays instantly.

Audit your mail server's encryption protocols in real-time. Execute live STARTTLS handshakes to detect TLS 1.3 support, extract cipher suites, and flag weak cryptography.

Execute live SMTP tests to debug 'Relaying Denied' errors. Test AUTH LOGIN, MAIL FROM, and RCPT TO in real-time to pinpoint exact mail server rejections without sending test spam.

Audit your mail server encryption in real-time. Execute live STARTTLS handshakes to extract SSL certificates, detect hostname mismatches, and verify cryptographic strength.

Check your mail server reputation in real-time. Execute concurrent DNS queries against major RBLs like Spamhaus and Barracuda to instantly detect IP blacklisting and decode exact return codes.

Audit your mail server security in real-time. Execute live SMTP commands to detect version leakage, prevent VRFY/EXPN user enumeration, and expose plaintext authentication risks.

Instantly decode cryptic SMTP bounce messages and server transcripts. Parse raw logs to extract RFC 3463 micro-codes, detect spam blocks, and get actionable remediations.

Detect critical open relay vulnerabilities in real-time. Execute live, zero-authentication routing tests to external domains to secure your mail server from spammers.

Scan standard and extended SMTP ports in real-time. Execute concurrent TCP socket tests to diagnose blocked ISP firewalls, detect filtered packets, and verify live 220 banners.

Securely verify SMTP credentials in real-time. Execute live AUTH LOGIN over STARTTLS/SSL to test app passwords, detect O365 tenant restrictions, and troubleshoot failed authentications.

Perform a live SMTP health check to audit mail server deliverability. Execute real TCP connections to verify Reverse DNS (PTR), validate FCrDNS, and ensure strict SMTP banner matching.

Verify your MX failover readiness in real-time. Execute live, concurrent TCP scans across your entire MX fleet to audit backup nodes, verify strict timeouts, and detect active failover.

Audit your SMTP transport security in real-time. Execute live DoH queries to verify MTA-STS enforcement, audit TLS-RPT records, and prevent MITM downgrade attacks.

Profile MTA capabilities in real-time. Execute live EHLO handshakes to extract precise SIZE limits, detect PIPELINING, and verify SMTPUTF8/8BITMIME readiness.

Don't simulate—send a real test email. Execute live end-to-end SMTP delivery tests. Track exact Message-IDs, verify inbox deliverability, and capture granular server errors instantly.

Run live concurrent TCP scans on SMTP ports 25, 465, and 587. Identify ISP blocks, measure exact network latency, and audit SSL/TLS certificate expiry in real-time.

Auto-discover your SMTP settings in real-time. Execute live DoH queries on MX records to detect your provider and generate precise Laravel, Node.js, and Python configs.

Verify your SMTP server accessibility in real-time. Execute live TCP socket connections to audit ports 25, 465, and 587, check STARTTLS, and extract exact auth mechanisms.

Profile your SMTP server's performance in real-time. Measure precise TCP/TLS latency, detect tarpitting banner delays, and run parallel stress tests via live connections.

Debug SMTP 535 authentication errors in real-time. Discover supported server mechanisms, inspect Base64 payloads, and test credentials live over encrypted TLS/SSL connections.