[sqwebmail] sqwebmail: (some) INVALID USER

[Christoph Fuchs]

Hello everybody, 

I'm running sqwebmail 0.37.3-2.3, courier-base 0.37.3-2.3, courier-imap 
1.4.2.-2.3, courier-imap-ssl 1.4.3.-3.3, qmail 1.03 and vpopmail 5.2.1 with 
an apache 1.3.26 on a debian woody box.
IMAP, IMAP-SSL and POP3 work fine, but some users can't login with 
sqwebmail. I checked the permissions with vuserinfo, but there's nothing 
that seems to disallow them the webmail login. 

The ID/password are correct, POP3 and IMAP-logins work just as they should. 

Do you have any ideas? 

Thank you,
Christoph Fuchs