Outlook Express keeps prompting for your password
http://www.dougknox.com/xp/tips/xp_oe_passwords.htm

Save password setting not retained in Outlook or Outlook Express:
http://support.microsoft.com/kb/290684

Cannot Save E-Mail Account Password in Outlook Express 5
http://support.microsoft.com/?kbid=228713

Save Password Check Box Is Unavailable
http://support.microsoft.com/?kbid=137361

I've tried the suggested Microsoft fixes 1, 2 a dn 3.  None work - i keep
getting the password prompt.. Any other suggestions?  using outlook 2007 and
Windows XP Sp 3.  tx

The Invalid password error message can mean that any of the following
are wrong:
- POP3 server name
- Incoming Mail Server Account Name (some require the full e-mail
address user@somewhere.com, others just want the user part)
- Incoming Mail Server Password (often case sensitive)
- Incorrect use of Secure Password Authentication (SPA) - few severs
use this
- Incorrect use of SSL - few servers use this, but it's becoming more
common
- The mail server is having temporary problems
- Anti-Virus scanning e-mail or anti-spam program interfering with the
mail server logon
Check these settings in Outlook Express at Tools, Accounts, Mail,
Properties, Servers (Advanced tab for SSL).  Check with your mail
service (generally your ISP) for the correct values.  If the values seem
correct, retype them and click APPLY.  In the event that the account
settings are corrupted in the registry, it might be necessary to delete
the mail account, restart OE and then set up the account again.  In some
cases it might be necessary to set up a new identity in OE and create
the mail account there.