[horde] 'Users' throws localhost 143 connection error

[Aaron E. Klemm]

Hi,
        
        I've got Horde, IMP, and Kronolith installed on a web server.
        The SQL is
        on the same machine, but IMAP is a remote machine. Everything
        seems to
        be fine except for trying to set up groups. When I click on
        "Users" under the
        Administration menu, I get the error pasted below.
        
        I can't find any setting to change and sending mail works for
        the remote
        smtp as well as receiving from the remote imap server.
        
        My horde configuration uses IMP to handle authentication which,
        in turn, authenticates off my IMAP server--it works too.
        
        Here's the error (thanks for your help!):
        
        A fatal error has occurred
        Connection failed to localhost.localdomain,143: Connection
        refused
        [line 236 of /var/www/horde/admin/user.php]
        
        
        Details (also in Horde's logfile):
        object(PEAR_Error)#30 (8) {
          ["error_message_prefix"]=>
          string(0) ""
          ["mode"]=>
          int(1)
          ["level"]=>
          int(1024)
          ["code"]=>
          string(11) "horde.error"
          ["message"]=>
          string(66) "Connection failed to localhost.localdomain,143:
        Connection refused"
          ["userinfo"]=>
          NULL
          ["backtrace"]=>
          array(8) {
            [0]=>
            array(6) {
              ["file"]=>
              string(23) "/usr/share/php/PEAR.php"
              ["line"]=>
              int(543)
              ["function"]=>
              string(10) "PEAR_Error"
              ["class"]=>
              string(10) "PEAR_Error"
              ["type"]=>
              string(2) "->"
              ["args"]=>
              array(5) {
                [0]=>
                string(66) "Connection failed to
        localhost.localdomain,143: Connection refused"
                [1]=>
                string(11) "horde.error"
                [2]=>
                int(1)
                [3]=>
                int(1024)
                [4]=>
                NULL
              }
            }
            [1]=>
            array(6) {
              ["file"]=>
              string(39) "/var/www/horde/lib/Horde/IMAP/Admin.php"
              ["line"]=>
              int(106)
              ["function"]=>
              string(10) "raiseError"
              ["class"]=>
              string(4) "PEAR"
              ["type"]=>
              string(2) "->"
              ["args"]=>
              array(2) {
                [0]=>
                string(66) "Connection failed to
        localhost.localdomain,143: Connection refused"
                [1]=>
                string(11) "horde.error"
              }
            }
            [2]=>
            array(6) {
              ["file"]=>
              string(39) "/var/www/horde/lib/Horde/IMAP/Admin.php"
              ["line"]=>
              int(197)
              ["function"]=>
              string(8) "_connect"
              ["class"]=>
              string(10) "IMAP_Admin"
              ["type"]=>
              string(2) "->"
              ["args"]=>
              array(0) {
              }
            }
            [3]=>
            array(6) {
              ["file"]=>
              string(30) "/var/www/horde/imp/lib/api.php"
              ["line"]=>
              int(270)
              ["function"]=>
              string(13) "listMailboxes"
              ["class"]=>
              string(10) "IMAP_Admin"
              ["type"]=>
              string(2) "->"
              ["args"]=>
              array(0) {
              }
            }
            [4]=>
            array(2) {
              ["function"]=>
              string(13) "_imp_userList"
              ["args"]=>
              array(0) {
              }
            }
            [5]=>
            array(4) {
              ["file"]=>
              string(37) "/var/www/horde/lib/Horde/Registry.php"
              ["line"]=>
              int(433)
              ["function"]=>
              string(20) "call_user_func_array"
              ["args"]=>
              array(2) {
                [0]=>
                string(13) "_imp_userList"
                [1]=>
                array(0) {
                }
              }
            }
            [6]=>
            array(6) {
              ["file"]=>
              string(45) "/var/www/horde/lib/Horde/Auth/application.php"
              ["line"]=>
              int(134)
              ["function"]=>
              string(13) "callByPackage"
              ["class"]=>
              string(8) "Registry"
              ["type"]=>
              string(2) "->"
              ["args"]=>
              array(2) {
                [0]=>
                string(3) "imp"
                [1]=>
                string(8) "userList"
              }
            }
            [7]=>
            array(6) {
              ["file"]=>
              string(29) "/var/www/horde/admin/user.php"
              ["line"]=>
              int(234)
              ["function"]=>
              string(9) "listUsers"
              ["class"]=>
              string(16) "Auth_application"
              ["type"]=>
              string(2) "->"
              ["args"]=>
              array(0) {
              }
            }
          }
          ["callback"]=>
          NULL
        }