[horde] can't login

[Andrew Stevens]

Hi, I just installed this on my website, but when I try to log in, I get the
following:

 

A fatal error has occurred

Auth_imp: Required IMAP extension not found.

Details have been logged for the administrator.

 

 

How can I resolve this.

 

The server is a postfix server running dovecot for pop3/imap connection.  My
mail clients can connect fine so I know that postfix and dovecot are
woroking