All communication to the timsieved daemon is done by the PEAR 
Net_Sieve library.

I you add a backend like this



/* Sieve Example */

$backends['sieve'] = array(

     'driver' => 'timsieved',

     'preferred' => array('XXX.XXX.XXX.XXX','ourserver.info'),

     'hordeauth' => true,

     'params' => array(

         // Hostname of the timsieved server

         'hostspec' => 'ourserver.info',

         // Login type of the server

         'logintype' => 'DIGEST-MD5',

         // Enable/disable TLS encryption

         'usetls' => true,

         // Port number of the timsieved server

         'port' => 2000,

         // Name of the sieve script

         'scriptname' => 'ingo'

         // The following settings can be used to specify an administration

         // user to update all users' scripts.

         // 'admin' => 'cyrus',

         // 'password' => '*****',

         // 'username' => Auth::getAuth(),

     ),

     'script' => 'sieve',

     'scriptparams' => array()

);



You will get a 60 seconds timeout after klicking on "Vacation"/ "Abwesenheit".

Switching back to Authmethod PLAIN results in immediate login.

Although The Vacation could be saved after 60seconds timeout. I have a 
strace of httpd process available if neccesary.  The obvious line 
looks like this.

Watch the poll(unfinished)"... after that httpd process is waiting 60seconds.



34129 poll([{fd=1926299654, 
events=POLLPRI|POLLOUT|POLLRDBAND|POLLWRBAND|0xffffd000, revents=POLL

PRI|POLLRDNORM|POLLWRBAND|POLLHUP|POLLNVAL|0xffffae00}], 1, 60000) = 1

34129 recvfrom(20, "\"IMPLEMENTATION\" \"Cyrus timsieved 
v2.3.9\"\r\n\"SASL\" \"DIGEST-MD5 CRAM-M

D5\"\r\n\"SIEVE\" \"comparator-i;ascii-numeric fileinto reject 
vacation imapflags notify envelope

  relational regex subaddress copy\"\r\nOK\r\n", 8192, MSG_DONTWAIT, 
NULL, NULL) = 199

34129 sendto(20, "AUTHENTICATE \"CRAM-MD5\"\r\n", 25, MSG_DONTWAIT, 
NULL, 0) = 25

34129 poll([{fd=1926333952, 
events=POLLIN|POLLPRI|POLLOUT|POLLRDBAND|POLLERR|POLLNVAL|0x7200, rev

ents=POLLIN|POLLPRI|POLLOUT|POLLRDBAND|POLLWRBAND|POLLERR|POLLNVAL|0xffffe000}], 1, 60000) = 
1

34129 recvfrom(20, 
"{60}\r\nPDExNDIzODE5MDAuMTYzMTQxMDJAbWFpbC5naWZ0LWNvbXBhbnkuY29tPg==\r\n", 
81

92, MSG_DONTWAIT, NULL, NULL) = 68

34129 poll( <unfinished ...>