Microsoft Outlook Express supposedly also allows multiple accounts; however,
all the mails from separate accounts are comingled together, making it quite
unpleasant to use.
Actually, with OE you can have multiple profiles and multiple accounts
per profile. If you put the
the separate accounts in the same profile then they will be comingled
(unless you filter them to separate
folders), but if you put each account in it's own profile then they
won't be (and you can password
protect profiles that hold sensitive mail)
--Ray