Profile Your SMTP Lifecycle
Simulate a full SMTP routing transaction up to the RCPT TO phase. We track the state machine progression and measure the exact millisecond latency of every single command to help you find bottlenecks.
Real-Time State Machine Tracking
Profile your SMTP lifecycle in real-time. We execute an actual state machine progression up to the RCPT TO phase, tracking exact command-by-command millisecond latency to pinpoint routing bottlenecks and detect greylisting, safely issuing an RSET to prevent test spam.
Simulate a full SMTP routing transaction up to the RCPT TO phase. We track the state machine progression and measure the exact millisecond latency of every single command to help you find bottlenecks.
Connection testing isn't enough. You need to know exactly how the server responds during the actual routing phase of the SMTP protocol.
RCPT TO phase.RSET instead of sending DATA. This safely tests routing logic without generating actual spam.4xx response during the RCPT TO phase is a strong indicator that the receiving server is employing Greylisting or active anti-spam throttling.Your feedback has been submitted successfully. We appreciate your help in improving our tools.