[horde] login caseinsensitiv, database error

[Anton Köstlbacher]

Hi all,

one of my clients just ran into a problem, resulting in the error 
message you find below. I can successfully reproduce the problem:

1) I created an account on the imap-server (horde authentication via 
imp, imap server is dovecot), for example: "abc at domain.tld"

2) Then try to login as "Abc at domain.tld"

3) Results in an existing session, you can change to imp, but for portal 
view horde gives an error message. See below.

Horde Webmail is 5.1.3. Is there a configuration option for 
casesensitivity of horde usernames or is dovecot configured wrong or am 
I doing something else wrong?

Thanks for your help!

Best regards,
Anton