diff --git a/internal/engine/experiment/smtp/smtp.go b/internal/engine/experiment/smtp/smtp.go
index 453807f..671dd16 100644
--- a/internal/engine/experiment/smtp/smtp.go
+++ b/internal/engine/experiment/smtp/smtp.go
@@ -144,7 +144,6 @@ func (r SMTPRunner) conn(addr string, port string) (net.Conn, bool) {
 	conn, err := dialer.DialContext(r.ctx, "tcp", net.JoinHostPort(addr, port))
 	r.tk.TCPConnect = append(r.tk.TCPConnect, r.trace.TCPConnects()...)
 	if err != nil {
-		r.tk.Failure = *tracex.NewFailure(err)
 		return nil, false
 	}
 	return conn, true