102CHAPTER 7: SYSTEM MANAGEMENT
The response field will show the result of the SMTP diagnostic probe, including the response for each SMTP command sent:
Sending mail...
<<<220 ESMTP Postfix (2.1.0) HELO example.com
<<<250 mail.example.com
MAIL FROM:sender@example.com
<<< 250 Ok
RCPT TO:joe@example.com
<<<250 Ok
DATA
<<<354 End data with <CR><LF>.<CR><LF> sending /tmp/smtpdata
<<<250 Ok: queued as F130F33EA6
QUIT
<<< 221 Bye
Ping Utility
The ping utility sends ICMP packets to a host and listens for a return packet. This ensures that you have network connectivity to the destination server. If you do not receive a response, the destination host may not be available or it may indicate that your 3Com Email Firewall does not have network connectivity.
Try to ping other hosts internal and external to your network. If you cannot ping any hosts external to your network, your Internet connection is most likely down.
For more detailed information on routing connectivity between the two hosts, use the traceroute utility.
