[horde] saving ingo rules to sieve sieveserver fail

[Andreas Schulze]

Hello,

after some pear updates I now noticed I can't update my sieve rules anymore.

2013-06-09T22:09:27+00:00 DEBUG: HORDE [ingo] Beim Aktivieren des  
Skripts ist ein Fehler aufgetreten. Fehlermeldung des Treibers:  
Verbindungsaufbau abgelehnt [pid 1730 on line 27 of  
"/usr/share/php/Horde/Core/Notification/Handler/Decorator/Hordelog.php"]

now: horde 5.1 from pear,, was working ~5 months ago.

# cat horde/ingo/config/backends.local.php
<?php
$backends['imap']['disabled'] = true;
$backends['sieve']['disabled'] = false;
$backends['sieve']['params']['hostspec'] = '192.168.1.1';
$backends['sieve']['params']['usetls'] = false;
$backends['sieve']['params']['debug'] = true;

the horde server can reach the sieve server (which is the same as the  
imap server):
# telnet 192.168.1.1 4190
Trying 192.168.1.1...
Connected to server.
Escape character is '^]'.
"IMPLEMENTATION" "Dovecot Pigeonhole"
"SIEVE" "fileinto reject envelope encoded-character vacation  
subaddress comparator-i;ascii-numeric relational regex imap4flags copy  
include variables body enotify environment mailbox date ihave  
vacation-seconds"
"NOTIFY" "mailto"
"SASL" "PLAIN"
"STARTTLS"
"VERSION" "1.0"
OK "Dovecot ready."

I also set $conf['log']['priority'] = 'DEBUG' in horde/config/conf.php  
and enabled dovecot debug logging. But still no idea whats going  
wrong...
Any hints?

Thanks
Andreas