Help with Multiple SMTP Servers

Hi,
    I am using Mozilla 1.2.1 on w2K machine. I have multiple POP based
accounts, each with its own distinct SMTP server. None of the Accounts
can use other SMTP servers, but have to use their own SMTP servers.
For Account1, whose SMTP server is set as default, I can send mail.
but for other Accounts I cannot send mail. I need   a facility by
which each account uses its own SMTP server, and not the default one.
That is, somewhat similar to Outlook Express, in which each mail
account uses its own SMTP server.  How do I do this in Mozilla 1.2.1??
     Any Suggestions of any type will be welcome

Thanks in Advance Guys