I have a three node network connect to my ISP through a Linksys 4 port router. MS Outlook Express is the mail client. Primary PC is able to send and receive mail. Second PC is able to receive mail but not send (ERROR: Unable to connect to SMTP-Server). I am able to ping the ISP’s mail server from both PC’s and get its IP address. I am also able to see its web address from the ping. Response from the mail server appears to reasonable time. I have enterd the web address and IP address in thethe server information boxes to no avail. Suggestions, comments directions would be appreciated.