GMail in your Outlook Express

You can retrieve your Gmail messages with a client or device that supports POP,
like Microsoft Outlook or Netscape Mail.

To enable POP in Gmail:
1. Sign in to Gmail.
2. Click Settings at the top of any Gmail page.
3. Click Forwarding and POP/IMAP.
4. Select Enable POP for all mail or Enable POP for mail that arrives from now on.
5. Choose the action you'd like your Gmail messages to take after they are accessed
with POP.
6. Configure your POP client* and click Save Changes.

Open your outlook express,
add indentities then fill this

Your Name : (optional)
E-mail address : (your Gmail address, including '@gmail.com')
User Name : (your Gmail address, including '@gmail.com')
Password : (your Gmail password)
Remember password : (optional)
Log on using Secure Password Authentication: disabled
Incoming mail server (POP3): pop.gmail.com
Outgoing mail server (SMTP): smtp.gmail.com

Outgoing Server tab
My outgoing server (SMTP) requires authentication : enabled
Use same settings as my incoming mail server : enabled

Advanced tab
Incoming server (POP3) : 995
This server requires a secure connection (SSL) : enabled
Outgoing server (SMTP) : 465 or 25
This server requires a secure connection (SSL) : enabled
Server Timeouts : (Greater than 1 minute, we recommend 5)
Leave a copy of messages on the server : disabled

source: google