[Dovecot] enabling quota.

2008-06-30 Thread Mauro Sanna
I'm reading http://wiki.dovecot.org/Quota to enable quota management
with dovecot.
The first question is: I need to enable dovecot deliver, lda protocol,
to have quota work?



Re: [Dovecot] Upgrade to 1.1 maildir shared folders problems

2008-06-30 Thread sami


On Sat, 28 Jun 2008, Timo Sirainen wrote:

 On Fri, 2008-06-27 at 10:50 +0300, [EMAIL PROTECTED] wrote:
  Hello,
 
  We recently upgraded to Dovecot 1.1 from 1.0.5 and we are having few
  issues:
 
  1) Maildir's are not created anymore for new users if they dont excits,
  the directories where created before, is this a configuration issue?

 I did change the code so that the maildir creation is delayed until it's
 really needed. But I don't know of any bugs in this, and I can't
 reproduce your problem. Could you show the error messages from the log
 file you get when a new user tries to access the mailbox?

Hello,

Telnet:
Escape character is '^]'.
* OK ready.
AUTH LOGIN testi33 testi33
AUTH OK Logged in.
Connection closed by foreign host.

Log:
Jun 30 11:14:47 [dovecot] imap-login: Login: user=testi33, method=PLAIN,
rip=212.116.32.210, lip=212.116.32.130
Jun 30 11:14:47 [dovecot] child 23578 (imap) killed with signal 11

Not much to go on here, i remember running in to this same problem in some
early 1.0 rc's, but if i remember correctly it just was fixed in a later
release and started working. Any ideas how to proceed on this one? i could
setup a test enviroment and run strace if needed?


  2) Cannot subscribe to shared folders, if currently subscribed they work
  fine but cannot re-subscribe, also i noticed that the control directory
  for the namespace is not created anymore, before it was, any ideas?

 Again the control directory creation is delayed until it's needed. So
 that might not be the actual problem. Are there anything in error logs
 when this happens?

 Also could you try manually so you can see what exactly Dovecot replies
 to the subscribe commands? Try something like:

 telnet localhost 143
 a login username password
 b unsubscribe shared/some-mailbox
 c subscribe shared/some-mailbox

 What are the replies?


if i list the mail boxes it does not show the folders under shared:


* LIST (\Noselect \HasNoChildren) / shared
. OK List completed.

The subscribe and unsubscribe seems to be working:

C unsubscribe shared/shared-folder
C OK Unsubscribe completed.
C subscribe shared/shared-folder
C OK Subscribe completed.

I get this in the logs:

Jun 30 11:17:44 [dovecot] imap-login: Login: user=username,
method=PLAIN,
rip=127.0.0.1, lip=127.0.0.1, secured
Jun 30 11:19:07 [dovecot] IMAP(username):
fchown(/var/mail/jaetut/temp.valas.17956.7b8393cabde89cbd) failed:
Operation not permitted
Jun 30 11:19:07 [dovecot] IMAP(username): dovecot-acl-list creation failed:
safe_mkstemp(/var/mail/jaetut/temp.valas.17956.7b8393cabde89cbd) failed:
Operation not permitted

It seems to be the problem is with listing the folders? as if im
subscribed to the folders they work fine, but can not see the folders
again in imap? The /var/mail/jaetut folder has write permission to
everyone. any ideas?

//sami




[Dovecot] Multiple auth client sockets

2008-06-30 Thread Ulrich Zehl
I use two seperate Postfix instances as MSAs (so that different policies
are simpler to configure), and both of them require Dovecot SASL support.

Since Postfix' smtpd is chrooted (at least in the Debian package), the
client socket needs to be somewhere under the instance's queue_directory.
This means I need two different auth client socket paths.
When I simply specify two client { ... } in dovecot.conf, the second
takes precedence over the first.

Besides using a second dovecot instance, which I'd like to avoid, what ways
are there to run a second client socket?

Ulrich


Re: [Dovecot] enabling quota.

2008-06-30 Thread Alexander Prinsier
Mauro Sanna wrote:
 I'm reading http://wiki.dovecot.org/Quota to enable quota management
 with dovecot.
 The first question is: I need to enable dovecot deliver, lda protocol,
 to have quota work?
 

It depends on the backend you use. If you use filesystem quota's, then
there is no need to use the dovecot LDA, because the actual quota usage
is already being updated by the filesystem/kernel itself.

However if you use Maildir++ quota, then something has to update the
maildirsize file so that it contains the actual usage of that Maildir.
So you need the dovecot LDA here, or another LDA that can update those
files in a compatible way.

However I prefer to always use dovecot's deliver, because it
automatically updates indexes and caches when a mail arrives, and this
cannot be done by another LDA because the indexes and caches are dovecot
specific.

Alexander


Re: [Dovecot] enabling quota.

2008-06-30 Thread Mauro Sanna
Il giorno lun, 30/06/2008 alle 12.15 +0200, Alexander Prinsier ha
scritto:
 Mauro Sanna wrote:
  I'm reading http://wiki.dovecot.org/Quota to enable quota management
  with dovecot.
  The first question is: I need to enable dovecot deliver, lda protocol,
  to have quota work?
  
 
 It depends on the backend you use. If you use filesystem quota's, then
 there is no need to use the dovecot LDA, because the actual quota usage
 is already being updated by the filesystem/kernel itself.
 
 However if you use Maildir++ quota, then something has to update the
 maildirsize file so that it contains the actual usage of that Maildir.
 So you need the dovecot LDA here, or another LDA that can update those
 files in a compatible way.
 
 However I prefer to always use dovecot's deliver, because it
 automatically updates indexes and caches when a mail arrives, and this
 cannot be done by another LDA because the indexes and caches are dovecot
 specific.

Thank you for ther answerlast question:
if I use dovecot deliver, in dovecot.conf I need to enable only

protocol lda {
  mail_plugins = quota
} 

or I must enable also

protocol pop3 {
  mail_plugins = quota
}

and in case I have imap

protocol imap {
  mail_plugins = quota imap_quota
}
?



Re: [Dovecot] enabling quota.

2008-06-30 Thread Alexander Prinsier
Mauro Sanna wrote:
 if I use dovecot deliver, in dovecot.conf I need to enable only
 
 protocol lda {
   mail_plugins = quota
 } 
 
 or I must enable also
 
 protocol pop3 {
   mail_plugins = quota
 }
 
 and in case I have imap
 
 protocol imap {
   mail_plugins = quota imap_quota
 }
 ?
 

You also need to specify what backend you want to use (fs quota,
maildir++ quota's, ...).

See here: http://wiki.dovecot.org/Quota/1.0

Alexander


Re: [Dovecot] enabling quota.

2008-06-30 Thread Mauro Sanna
Il giorno lun, 30/06/2008 alle 13.32 +0200, Alexander Prinsier ha
scritto:
 Mauro Sanna wrote:
  if I use dovecot deliver, in dovecot.conf I need to enable only
  
  protocol lda {
mail_plugins = quota
  } 
  
  or I must enable also
  
  protocol pop3 {
mail_plugins = quota
  }
  
  and in case I have imap
  
  protocol imap {
mail_plugins = quota imap_quota
  }
  ?
  
 
 You also need to specify what backend you want to use (fs quota,
 maildir++ quota's, ...).

Yes I've just specified it, it's maildir butI need to enable
quota only for protocol lda or also for pop3 and imap?



Re: [Dovecot] Upgrade to 1.1 maildir shared folders problems

2008-06-30 Thread Timo Sirainen
On Mon, 2008-06-30 at 11:31 +0300, [EMAIL PROTECTED] wrote:
 
 Jun 30 11:14:47 [dovecot] imap-login: Login: user=testi33, method=PLAIN,
 rip=212.116.32.210, lip=212.116.32.130
 Jun 30 11:14:47 [dovecot] child 23578 (imap) killed with signal 11

That's a crash. Could you get gdb backtrace from it? See
http://dovecot.org/bugreport.html how to do it.

 Jun 30 11:19:07 [dovecot] IMAP(username):
 fchown(/var/mail/jaetut/temp.valas.17956.7b8393cabde89cbd) failed:
 Operation not permitted
 Jun 30 11:19:07 [dovecot] IMAP(username): dovecot-acl-list creation failed:
 safe_mkstemp(/var/mail/jaetut/temp.valas.17956.7b8393cabde89cbd) failed:
 Operation not permitted

Do you use SELinux or something like that? Operation not permitted is
not the same as Permission denied which comes with normal filesystem
permission problems.



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Re: [Dovecot] Upgrade to 1.1 maildir shared folders problems

2008-06-30 Thread sami


On Mon, 30 Jun 2008, Timo Sirainen wrote:

 On Mon, 2008-06-30 at 11:31 +0300, [EMAIL PROTECTED] wrote:
 
  Jun 30 11:14:47 [dovecot] imap-login: Login: user=testi33, method=PLAIN,
  rip=212.116.32.210, lip=212.116.32.130
  Jun 30 11:14:47 [dovecot] child 23578 (imap) killed with signal 11

 That's a crash. Could you get gdb backtrace from it? See
 http://dovecot.org/bugreport.html how to do it.

Here is a backtrace from a test-server, running newer debian than the
production boxes:

#0  fs_quota_mount_init (root=0x81098f0, mount=0x0) at quota-fs.c:210
roots = (struct quota_root * const *) 0x8109890
i = 1
#1  0xb7e34bd1 in fs_quota_storage_added (quota=0x8109850,
storage=0x810a148) at quota-fs.c:253
mount = (struct fs_quota_mountpoint *) 0x0
root = value optimized out
dir = value optimized out
is_file = false
#2  0xb7e32d66 in quota_add_user_storage (quota=0x8109850,
storage=0x810a148) at quota.c:467
roots = value optimized out
storages = value optimized out
backends = value optimized out
path = 0x810a540 /var/spool/mail/testi33/
path2 = value optimized out
i = 1
is_file = false
#3  0xb7e37d44 in quota_mail_storage_created (storage=0x810a148) at
quota-storage.c:469
qstorage = (union mail_storage_module_context *) 0x810a240
#4  0x080a0646 in mail_storage_create (ns=0x8109d40, driver=0x8100178
maildir, data=value optimized out,
user=0xbf971f65 testi33, flags=3328,
lock_method=FILE_LOCK_METHOD_FCNTL, error_r=0xbf971028) at
mail-storage.c:254
_data_stack_cur_id = 3
storage_class = (struct mail_storage *) 0x80f9640
storage = (struct mail_storage *) 0x810a148
classes = (struct mail_storage * const *) 0xa
home = value optimized out
value = value optimized out
i = 0
count = 1
#5  0x0809eaa0 in mail_namespaces_init (pool=0x8109d28, user=0xbf971f65
testi33, namespaces_r=0xbf971084) at mail-namespace.c:81
_data_stack_cur_id = 2
namespaces = (struct mail_namespace *) 0x0
ns = value optimized out
ns_p = (struct mail_namespace **) 0xbf971038
flags = 3072
lock_method = FILE_LOCK_METHOD_FCNTL
mail = value optimized out
data = 0xbf971d30
maildir:/var/spool/mail/testi33//:INDEX=/var/dovecot/index/testi33:CONTROL=/var/dovecot/control/testi33
error = value optimized out
i = 1
#6  0x080681bf in main (argc=135305456, argv=0xbf971124, envp=0xbf971134)
at main.c:234
home = 0x0


Seems to be quota plugin related, i removed the plugin and i could log on
with a new user that did not have a maildir yet.

When we upgraded to 1.1 i enabled the quota plugin witch i forgot to
mention (sorry) since it was working nicely and reporting the quota to the
users. quota is from a netapp filer that we use over nfs, any idea if we
can make this work? later we will change to dovecots deliver and use it's
quota, but mean time it would be nice for the users to see their quota
directly from the mail client.


  Jun 30 11:19:07 [dovecot] IMAP(username):
  fchown(/var/mail/jaetut/temp.valas.17956.7b8393cabde89cbd) failed:
  Operation not permitted
  Jun 30 11:19:07 [dovecot] IMAP(username): dovecot-acl-list creation failed:
  safe_mkstemp(/var/mail/jaetut/temp.valas.17956.7b8393cabde89cbd) failed:
  Operation not permitted

 Do you use SELinux or something like that? Operation not permitted is
 not the same as Permission denied which comes with normal filesystem
 permission problems.


Not using SELinux, the location is also nfs if it makes a diffrence
(control + index files are going to a local disk). i get the same error on
the testbox as well, anything i could do to find out more why it's not
creating the file?

//sami





[Dovecot] No log for hitting login_max_processes_count?

2008-06-30 Thread Adam McDougall
I think today just due to increased use, my mail servers hit 
login_max_processes_count.  It wasn't obvious what was happening, logins 
just weren't acting like they should and sometimes would get 
disconnected before given a prompt from the server.  Something made me 
think to check if I had too many of certain dovecot processes and I 
found I had 128 imap-login processes on both servers, but nothing in the 
logs seemed to point that out for me.  Should there be?  It would have 
been alot easier to debug.  Also, this seems to be from general use, 
doesn't seem like a DoS, so is this just a setting I should keep an eye 
on and increase it by reasonable amounts as needed?  Thanks.


Re: [Dovecot] No log for hitting login_max_processes_count?

2008-06-30 Thread Bryan Polk
We ran into a similiar problem after migrating to Dovecot on Solaris with 
an LVS in front. Tweaking some config options cleared it up. Specifically 
turning on auth_cache:


# Authentication Cache
auth_cache_size = 10240
auth_cache_ttl = 18000

It went from hundreds of login processes down to 20-60.


Bryan Polk
Unix Systems Administrator
Communication and Multimedia Services
FAMU-FSU College of Engineering
(850) 410-6164
[EMAIL PROTECTED]


On Mon, 30 Jun 2008, Adam McDougall wrote:

I think today just due to increased use, my mail servers hit 
login_max_processes_count.  It wasn't obvious what was happening, logins just 
weren't acting like they should and sometimes would get disconnected before 
given a prompt from the server.  Something made me think to check if I had 
too many of certain dovecot processes and I found I had 128 imap-login 
processes on both servers, but nothing in the logs seemed to point that out 
for me.  Should there be?  It would have been alot easier to debug.  Also, 
this seems to be from general use, doesn't seem like a DoS, so is this just a 
setting I should keep an eye on and increase it by reasonable amounts as 
needed?  Thanks.




[Dovecot] Dovecot + Postfix for Squirrel Webmail??

2008-06-30 Thread Marcos Cabrera Goñi
Hi,

 

I would like to use Dovecot as IMAP Server in order to Develope a Squirrel 
Webmail.

 

I have a problem with the Dovecot configuration; I have my Postfix server in 
the host: 192.168.100.100, and I have installed Dovecot in the host: 
192.168.1.253. Everything goes right, but I can't see any mail that I had 
received in my mailbox. 

 

How can I configure the dovecot.conf in order to use an mbox placed in a 
different host??

 

Thanks.

 

Bye

 

Marcos Cabrera Goñi

Departamento de Operaciones

Comitas Comunicaciones S.A.

Ronda de Poniente 4

Centro Empresarial Euronova 3

28760 - Tres Cantos - Madrid - España

Central: +34 91 151 76 00

Móvil:+34 666 578 885

[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] 

 



[Dovecot] Vacation?

2008-06-30 Thread kbajwa
CentOS 5.1
Dovecot  Postfix (part of CentOS install  updated)

I understand that there is a package which is part of Dovecot to handle
Auto Responses known as Vacation.

Where I can find more info on this package  especially how to install 
configure it?

Thanks

Kirt




[Dovecot] Poor pop3 over nfs performance

2008-06-30 Thread Mark Zealey
Hi,

About a week ago I upgraded our reasonably heavily loaded mail servers
from a pretty recent courier version to dovecot-1.1rc10. IMAP
performance on dovecot is amazing, however POP3 performance is worse
than courier :-( I have uploaded some munin graphs taken today to
http://linweb.atlas.pipex.net/dovecot/; the dovecot server is handling
about 2000 pop logins/sec and 300 imap sessions (but these are
negligible in terms of nfs ops). The courier server is handling a
similar number of pop logins/sec but no imap (slightly less traffic
overall but a similar number of logins). As you can see, dovecot seems
to issue an awful lot more read requests than courier. The big spike at
10am is where I tried setting the :INDEX=MEMORY flag on dovecot as I
assumed that's what courier is doing. I've also attached graphs of the
relative network usage - as you can see, dovecot is using up to 100mbps
whereas courier is using less than 10mbps; I believe this is due to the
read. I initially assumed this high read load was due to courier
building up its index files, but this has now been happening for about a
week with little variation.

The servers are both centos 5.0 (perhaps 5.1 actually, but with the
latest centosplus kernel which fixes the nfs lookup bug in the standard
kernels); and are not running any other nfs programs. The NFS server is
a high performance NAS unit - no issues there. We're only using
Maildirs; relevant config options are:

mmap_disable: yes
dotlock_use_excl: no
mail_nfs_storage: yes
mail_nfs_index: yes
lock_method: dotlock
maildir_copy_preserve_filename: yes

Thanks,

Mark


Re: [Dovecot] Poor pop3 over nfs performance

2008-06-30 Thread Charles Marcus

Sorr I can't give you an answer for your problem, but...

On 6/30/2008 12:05 PM, Mark Zealey wrote:

About a week ago I upgraded our reasonably heavily loaded mail servers
from a pretty recent courier version to dovecot-1.1rc1o.


1.1.1 was released on 6/22, so you're a bit behind the curve... its 
normally recommended to upgrade to a release version before reporting 
problems...



relevant config options are:


Output of dovecot -n is preferred to selective snips from dovecot.conf...

Also, dovecot is primarily an IMAP server, but someone else will have to 
tell you if the POP performance you are experiencing is normal or not...


--

Best regards,

Charles


Re: [Dovecot] Vacation?

2008-06-30 Thread Charles Marcus

On 6/30/2008, kbajwa ([EMAIL PROTECTED]) wrote:

I understand that there is a package which is part of Dovecot to handle
Auto Responses known as Vacation.

Where I can find more info on this package  especially how to install 
configure it?


http://wiki.dovecot.org/LDA/Sieve

--

Best regards,

Charles


Re: [Dovecot] courier IMAP to dovecot migration: folders not showing up

2008-06-30 Thread Jacob Yocom-Piatt

Charles Marcus wrote:

On 6/27/2008 8:27 PM, Jacob Yocom-Piatt wrote:

any clues on how to fix this issue would be welcome.


It will probably be helpful to provide output of dovecot -n so we can 
see your config... ?




hope this sheds some light on the matter... will try recopying the 
maildirs and redoing the suggested conversion procedure.



# 1.0.13: /usr/pkg/etc/dovecot.conf
protocols: imaps
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable: /usr/pkg/libexec/dovecot/imap-login
valid_chroot_dirs: /var/vmail
first_valid_uid: 1001
last_valid_uid: 1002
first_valid_gid: 100
last_valid_gid: 1000
mail_location: maildir:/var/vmail/%d/%n
mail_debug: yes
auth default:
 mechanisms: plain login cram-md5
 passdb:
   driver: passwd-file
   args: /usr/pkg/etc/dovecot.passdb
 passdb:
   driver: passwd
 userdb:
   driver: passwd
 userdb:
   driver: static
   args: uid=1002 gid=100 home=/var/vmail/%d/%n
 socket:
   type: listen
   client:
 path: /var/spool/postfix/private/auth
 mode: 432
 user: postfix
 group: postfix


cheers,
jake


Re: [Dovecot] can't download attachment from the wiki

2008-06-30 Thread Johannes Berg
On Mon, 2008-06-30 at 17:32 -0400, Andrew Schulman wrote:
   Hi.  At http://wiki.dovecot.org/ManageSieve#line-229 , I want to
   download the patch that's supposed to fix two problems in Avelsieve. 
   Unfortunately, when I click on the link to the patch, I always get an
   error message:
  
   You are not allowed to do AttachFile on this page.
 
  Ouch, sorry, I advised Timo to disable AttachFile because somebody was
  using the dovecot wiki to distribute some key files for something that
  had nothing to do with dovecot.
 
 Johannes, thanks.  While we're waiting for that to get sorted out, could 
 someone be so kind as to email me the patch?  Thanks, Andrew.

Sorry, I can't, I can't access the wiki outside of the regular web
interface either.

johannes


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[Dovecot] newbie: problem with IMAPS + mutt + Thunderbird

2008-06-30 Thread Toni Mueller

Hi,

I'm a Dovecot newbie and have some problems with the configuration/the
resulting interoperability. My setup looks like this:

I receive my mail using qmail-ldap and sort it with a number of means
into

  ~/Mailbox/ (= INBOX) and
  ~/Mail/folder/ for various values of 'folder' (generally one folder
  per mailing list).

The sorting is done via .qmail-* files, LDAP entries, and procmail
(this is a legacy setup that I'd rather not change too much).

I usually access my mail using 'mutt' on the local machine (Debian
4.0), and everything is fine. I'd like to be able to access the same
email using Thunderbird over IMAPS as well, to gain foreign character
support (ie, Chinese), while continuing to use mutt as my main MUA.


There are, so far, two problems with this setup:

1. I can't find the folders in ~/Mail/. As an interim solution, I
   symlinked them from my ~/Mailbox/ dir, but this is _dead_ugly_.

2. (MUCH more serious) As soon as I access the email using Thunderbird,
   Dovecot moves all new mail from

   somefolder/new to somefolder/cur, thereby making mutt flag all my
   new mail as 'O' (old) which was flagged 'N' (new) before.

   If I remember which the new mails were, I can flag them as 'N' in
   mutt, and they get moved to .../new again, but this isn't usually
   the case because my mailboxen are often large ( 10.000 messages),
   and it's undone as soon as I access the mailbox with Thunderbird
   (over IMAPS).


I also have a wish list. Both Mutt and Dovecot (can) make use of index
files to speed mail access. It would be great if this could be unified
so that both programs use the same index files (in a consistent manner,
of course).


The software versions I currently use are these:

Mutt:  1.5.17+2008011
Dovecot: 1.0.13-1~bpo40
Thunderbird: 1.5.0.13+1.5.0


Dovecot configuration:

log_timestamp: %Y-%m-%dT%H:%M:%S 
protocols: imaps
ssl_listen: 10.10.10.1:993
login_dir: /var/run/dovecot/login
login_executable: /usr/lib/dovecot/imap-login
login_processes_count: 2
login_max_processes_count: 20
max_mail_processes: 30
first_valid_uid: 2000
first_valid_gid: 2000
mail_location: maildir:~/Mail:INBOX=~/Mailbox/
mail_debug: yes
auth default:
  verbose: yes
  passdb:
driver: ldap
args: /etc/dovecot/dovecot-ldap.conf
  userdb:
driver: ldap
args: /etc/dovecot/dovecot-ldap.conf




Kind regards,
--Toni++


Re: [Dovecot] Vacation?

2008-06-30 Thread kbajwa
I tried installing Dovecot Sieve Plugin. When I enter the command:

% ./configure --with-dovecot=../dovecot-1.0.7

I get the error:

Error: C processor lib/cpp fails sanity check.

I think the problem may be that I am installing wrong version of
Dovecot-Sieve-Plugin. Here is my system, just in case I am right:

CentOS 5.1
postfix-2.3.3 (Note)
dovecot-1.0.7 (Note)
dovecot-sieve-1.1.5

Note: Both postfix  dovecot are installed from CentOS 5.1 distro. I am sure
that there are also updates.

Can somebody help with this problem? I am pretty GREEN, therefore, if you
can provide with 4-5 installation lines, I will really appreciate it.

Thanks.

Kirti





-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Charles Marcus
Sent: Monday, June 30, 2008 12:50 PM
To: dovecot@dovecot.org
Subject: Re: [Dovecot] Vacation?

On 6/30/2008, kbajwa ([EMAIL PROTECTED]) wrote:
 I understand that there is a package which is part of Dovecot to handle
 Auto Responses known as Vacation.
 
 Where I can find more info on this package  especially how to install 
 configure it?

http://wiki.dovecot.org/LDA/Sieve

-- 

Best regards,

Charles




Re: [Dovecot] Vacation?

2008-06-30 Thread Patrick Nagel
Hi Kirti,

On Tuesday 01 July 2008, kbajwa wrote:
 I tried installing Dovecot Sieve Plugin. When I enter the command:

 % ./configure --with-dovecot=../dovecot-1.0.7

 I get the error:

 Error: C processor lib/cpp fails sanity check.

 I think the problem may be that I am installing wrong version of
 Dovecot-Sieve-Plugin. Here is my system, just in case I am right:

 CentOS 5.1
 postfix-2.3.3 (Note)
 dovecot-1.0.7 (Note)
 dovecot-sieve-1.1.5

 Note: Both postfix  dovecot are installed from CentOS 5.1 distro. I am
 sure that there are also updates.

 Can somebody help with this problem? I am pretty GREEN, therefore, if you
 can provide with 4-5 installation lines, I will really appreciate it.

 Thanks.

 Kirti

I recommend that you use the CentOS RPMs from atrpms.net (1.1 branch) - they 
work very well for me and other people here on the list. You don't need to 
build anything from source then.

Once you have them running, follow the Wiki article that Charles provided a 
link to - it describes how to work with dovecot's sieve interpreter. One of 
the possibilities that come with sieve is the 'vacation' extension.

Patrick.

-- 
STAR Software (Shanghai) Co., Ltd.http://www.star-group.net/
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