WARNING! Your server could be an open relay.
HELO please-read-policy.mxtoolbox.com
220-We do not authorize the use of this system to transport unsolicited [0 ms]
MAIL FROM: <test@mxtoolbox.com>
220 and/or bulk e-mai [0 ms]
RCPT TO: <test@mxtoolbox.com>
250 server.aaaa.com Hello mxtb-pws1.mxtoolbox.com [64.20.227.13 [203 ms]
QUIT
250 [1156 ms]