Quote:
a user can't send or receive email
If it is just one person who cannot send and receive email on a server that others CAN send and recieve email, then you need to concentrate at looking at what is different about that person's account.
First you should look for problems with how the account is set up and then move on to the following:
Explain how your email works:
Do you have a centralized email host where all email is sent and then distributed from?
Is this local email to your LAN or to the Internet?
What MTA are you using (Sendmail is installed by default on most Solaris 2.6 distributions)?
Show any error messages from /var/adm/messages or from the terminal window when the user attempts to send mail.