Configure Outlook Express for mail accounts :
First of all you need to know whether your mail server supports imap or pop access.Yahoo,Hotmail doesn't support pop access for free.Gmail (free) supports pop access.
for configuring gmail do these steps in outlook express
1) go to tools-accounts click mail tab then click add mail
2) Add display name (give any) click next then give your complete gmail address like
user@gmail.com then click next my incoming server (select POP3),Incoming mail server (give value : pop.gmail.com),Outgoing smtp server (give value : smtp.gmail.com),click next
3)Account name : (give your complete gmail address like
user@gmail.com),Password : (password for your gmail account),tick remember password area if you want outlook express to store your password,untick secure password authentication (SPA).Click finish
4)Now click your created account and click properties then click advanced (tab) now change SMTP value to 465,tick this server requires authentication (SSL)
then change POP value to 995,tick this server requires authentication (SSL)