DNS load balancing
Hello I'm setting up a two-machine cyrus cluster using OCFS2 over DRBD. The setup is working fine, and I'm now considering the load balancing options I have. I believe the simplest option would be to simply rely on DNS load balancing. However, for this to work, I need to consider what happens when one of the cluster nodes fails, regarding the clients which access the cluster: - Will IMAP and POP3 clients automatically try the second DNS entry if connecting to the first one fails? - Will the LMTP client also do this? I'm using the postfix LMTP client for delivery. Does any one have experience with this kind of setup? Thanks in advance, Andre Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
On Tue, May 11, 2010 at 09:35:26AM -0300, Andre Nathan wrote: > Hello > > I'm setting up a two-machine cyrus cluster using OCFS2 over DRBD. The > setup is working fine, and I'm now considering the load balancing > options I have. > > I believe the simplest option would be to simply rely on DNS load > balancing. However, for this to work, I need to consider what happens > when one of the cluster nodes fails, regarding the clients which access > the cluster: > > - Will IMAP and POP3 clients automatically try the second DNS entry if >connecting to the first one fails? > - Will the LMTP client also do this? I'm using the postfix LMTP client >for delivery. > > Does any one have experience with this kind of setup? > > Thanks in advance, > Andre > Hi Andre, Most mail clients will provide a very poor user experience for failover with DNS load balancing. Almost any other option would be a better choice although not as simple to implement. Regards, Ken Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
Quoting Andre Nathan : Hello I'm setting up a two-machine cyrus cluster using OCFS2 over DRBD. The setup is working fine, and I'm now considering the load balancing options I have. For Clustering Cyrus have a look at http://cyrusimap.web.cmu.edu/twiki/bin/view/Cyrus/CyrusCluster I have no experiance with OCFS2 but an active-active cyrus cluster on a shared filesystem is tricky at best. I believe the simplest option would be to simply rely on DNS load balancing. However, for this to work, I need to consider what happens when one of the cluster nodes fails, regarding the clients which access the cluster: Depending on the OS and Networksetting this can take some time, because the OS and relaying DNS-server may cache the result. - Will IMAP and POP3 clients automatically try the second DNS entry if connecting to the first one fails? - Will the LMTP client also do this? I'm using the postfix LMTP client for delivery. The will try to reconnect but might use the old DNS answer. Does any one have experience with this kind of setup? We use this kind of loadbalancing for web-proxys and smtp-server but if one node fails there are some clients that try to connect the failed node You should take a look at ClusterIP, Cyrus Murder and Cyrus Replication Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html M.MengeTel.: (49) 7071/29-70316 Universität Tübingen Fax.: (49) 7071/29-5912 Zentrum für Datenverarbeitung mail: michael.me...@zdv.uni-tuebingen.de Wächterstraße 76 72074 Tübingen smime.p7s Description: S/MIME Signatur Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
2010/5/11 Andre Nathan : > Hello > > I'm setting up a two-machine cyrus cluster using OCFS2 over DRBD. The > setup is working fine, and I'm now considering the load balancing > options I have. > > I believe the simplest option would be to simply rely on DNS load > balancing. However, for this to work, I need to consider what happens > when one of the cluster nodes fails, regarding the clients which access > the cluster: > > - Will IMAP and POP3 clients automatically try the second DNS entry if > connecting to the first one fails? > - Will the LMTP client also do this? I'm using the postfix LMTP client > for delivery. > > Does any one have experience with this kind of setup? > > Thanks in advance, > Andre LVS is quite simple to setup this days, there's no need to patch the kernel with any mainstream distribution... Regards, -- Ciro Iriarte http://cyruspy.wordpress.com -- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
2010/5/11 Kenneth Marshall : > On Tue, May 11, 2010 at 09:35:26AM -0300, Andre Nathan wrote: >> Hello >> >> I'm setting up a two-machine cyrus cluster using OCFS2 over DRBD. The >> setup is working fine, and I'm now considering the load balancing >> options I have. >> By the way, did you test your setup with considerable load?, I was really interested in this kind of solution, looking at various docs and mail posts, main concern seems to be file locking Regards, -- Ciro Iriarte http://cyruspy.wordpress.com -- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
On Tue, 2010-05-11 at 08:57 -0400, Ciro Iriarte wrote: > LVS is quite simple to setup this days, there's no need to patch the > kernel with any mainstream distribution... Yeah, that was my second option, as I already use it for other services. I was just wondering if I could come up with something more "stand alone". Thanks Andre Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
On Tue, 2010-05-11 at 09:16 -0400, Ciro Iriarte wrote: > By the way, did you test your setup with considerable load?, I was > really interested in this kind of solution, looking at various docs > and mail posts, main concern seems to be file locking I've tested DRBD and OCFS2 under heavy load, but not Cyrus yet. >From what I've been reading, it should be fine if I avoid BerkeleyDB. What I still haven't figured out is how to keep the proc directory and the locks in the socket directory local to the cluster nodes. For the socket names there are configuration options, so I could just choose different names for each cluster node. Best regards, Andre Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
Hi,
> I'm setting up a two-machine cyrus cluster using OCFS2 over DRBD. The
> setup is working fine, and I'm now considering the load balancing
> options I have.
>
> I believe the simplest option would be to simply rely on DNS load
> balancing. However, for this to work, I need to consider what happens
> when one of the cluster nodes fails, regarding the clients which access
> the cluster:
>
> - Will IMAP and POP3 clients automatically try the second DNS entry if
>connecting to the first one fails?
> - Will the LMTP client also do this? I'm using the postfix LMTP client
>for delivery.
>
> Does any one have experience with this kind of setup?
I've not done this with Cyrus servers but to make DNS load balancing
like this "failover safe" there are a couple of solutions.
I guess in DNS you have something like the following:
-
imap A a.b.c.x
imap A a.b.c.y
host1 A a.b.c.x
host2 A a.b.c.y
-
If you have a couple of spare IPs you can assign things like this instead:
-
imap A a.b.c.x
imap A a.b.c.y
host1 A a.b.c.p
host2 A a.b.c.q
-
Then use something like wackamole (http://www.backhand.org/wackamole/)
to ensure that a.b.c.{x,y} are always being listened on by exactly 1
machine each. a.b.c.{p,q} would be used to admin access to specific
machines.
This option involves installing and configuring the wackamole software
on each host.
DNS will give each client an arbitrary IP address. If the server
listening on that IP address fails wackamole will move the IP from the
failed host to another. This will cause all the connected clients to
have to reconnect. New clients that come along whilst a node failure is
in progress will not experience anything unusual but you might have to
check the semantics when a new server is added to the pool.
The alternative is to delgate 'imap' as a subdomain in DNS thusly:
-
imap NS host1
imap NS host2
host1 A a.b.c.p
host2 A a.b.c.q
-
Then run bind on host1 and host2 to serve the imap zone. On host1 it
would look like this:
-
@ A a.b.c.p
-
and on host2 it would look like this:
-
@ A a.b.c.q
-
You should set appropriately short TTLs on imap and the delegated zone.
This will mean that each client will randomly resolve to one of the
machines. When a machine is down its DNS server will also be down so the
lookup will timeout in the client's resolver and it will try the other
NS servers listed in turn until it gets a server that will give it an A
record.
In failure cases existing clients will wobble for a bit until their
cache expires and then the connections will have to be reestablished.
New clients will just take slightly longer to connect in some situations
but that will (hopefully) pass mostly unnoticed by the users.
Regards,
@ndy
--
andy...@ashurst.eu.org
http://www.ashurst.eu.org/
0x7EBA75FF
Cyrus Home Page: http://cyrusimap.web.cmu.edu/
Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
On 5/11/2010 6:40 AM, Andre Nathan wrote: > What I still haven't figured out is how to keep the proc directory and > the locks in the socket directory local to the cluster nodes. For the > socket names there are configuration options, so I could just choose > different names for each cluster node. > > We symlink our proc and log directories out to TMPFS directories local to each server. There is little sense to keeping proc & logs on disk IMO. Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
email inaccessible through imap after reading
Hello. I'm having problem with emails being inaccessible through imap after reading it in outlook. The email file is still in the INBOX if I grep for it's mail id, but no imap client displays it. I've tried with mutt and pop3 but I couldn't find the email either. This server uses cyrus 2.3.14. I've never had any similar problems on any of my other servers. My guess is that outlook does something to the message to hide it from displaying but I've got no idea how to check this. Does anyone have any idea why would this happen? Thanks Martin Kraus Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: DNS load balancing
On Tue, 2010-05-11 at 09:12 -0700, Vincent Fox wrote: > We symlink our proc and log directories out to > TMPFS directories local to each server. There is > little sense to keeping proc & logs on disk IMO. Do you know if the log directory is used even when none of the databases is set to berkeleydb? Thanks, Andre Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
installing 2.3.16 on slackware64-13
Hi,
I'm trying to get cyrus imap running on new machine, I've compiled and
installed it without errors but when I start master the imapd processes
are dying immediately from what looks like a divide by zero error.
I'm going from 2.2.12 to 2.3.16 so I'm not entirely sure I've got the
config right.
Here is my imap.conf
configdirectory: /srv/imap
partition-default: /srv/imap/spool
admins: root
sasl_pwcheck_method: auxprop saslauthd
allowanonymouslogin: 0
servername: mercury
allowplaintext: yes
reject8bit: no
sendmail: /usr/sbin/sendmail
tls_cert_file: /etc/ssl/imap.whitecube.com.cert.pem
tls_key_file: /etc/ssl/imap.whitecube.com.key.pem
tls_session_timeout: 0
altnamespace: 1
unixhierarchysep: 0
sievedir: /srv/imap/sieve
idlesocket: /var/imap/socket/idle
lmtpsocket: /var/imap/socket/lmtp
and cyrus.conf
# standard standalone server implementation
START {
# do not delete this entry!
recover cmd="ctl_cyrusdb -r"
# this is only necessary if using idled for IMAP IDLE
idledcmd="idled"
}
# UNIX sockets start with a slash and are put into /var/imap/socket
SERVICES {
# add or remove based on preferences
imap cmd="imapd -T 0" listen="imap" prefork=9
imaps cmd="imapd -s -T 0" listen="imaps" prefork=2
# pop3 cmd="pop3d" listen="pop3" prefork=0
# pop3scmd="pop3d -s" listen="pop3s" prefork=0
sieve cmd="timsieved" listen="sieve" prefork=1
# these are only necessary if receiving/exporting usenet via NNTP
# nntp cmd="nntpd" listen="nntp" prefork=0
# nntpscmd="nntpd -s" listen="nntps" prefork=0
# at least one LMTP is required for delivery
# lmtp cmd="lmtpd" listen="lmtp" prefork=0
lmtpunix cmd="lmtpd" listen="/var/imap/socket/lmtp" prefork=0
# this is only necessary if using notifications
# notify cmd="notifyd" listen="/var/imap/socket/notify"
proto="udp" prefork=1
}
EVENTS {
# this is required
checkpointcmd="ctl_cyrusdb -c" period=30
# this is only necessary if using duplicate delivery suppression,
# Sieve or NNTP
delprune cmd="cyr_expire -E 3"at=0400
# this is only necessary if caching TLS sessions
tlsprune cmd="tls_prune" at=0400
}
this is what I get from ps
cyrus 9661 7.0 0.0 51204 3932 pts/0S17:23 0:00
/usr/cyrus/bin/master
cyrus 9666 0.0 0.0 85620 2500 pts/0S17:23 0:00 timsieved
cyrus 9669 0.0 0.0 85620 2500 pts/0S17:23 0:00 timsieved
cyrus10609 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10611 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10612 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10613 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10614 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10615 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10616 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10617 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10622 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
cyrus10623 0.0 0.0 0 0 pts/0Z17:23 0:00 [imapd]
and in the logs
May 11 17:23:52 mercury1 master[9661]: process started
May 11 17:23:52 mercury1 ctl_cyrusdb[9662]: recovering cyrus databases
May 11 17:23:52 mercury1 ctl_cyrusdb[9662]: skiplist: checkpointed
/srv/imap/mailboxes.db (18265 records, 1802644 bytes) in 0 seconds
May 11 17:23:52 mercury1 ctl_cyrusdb[9662]: skiplist: checkpointed
/srv/imap/annotations.db (0 records, 144 bytes) in 0 seconds
May 11 17:23:52 mercury1 ctl_cyrusdb[9662]: done recovering cyrus databases
May 11 17:23:52 mercury1 master[9661]: ready for work
May 11 17:23:52 mercury1 ctl_cyrusdb[9663]: checkpointing cyrus databases
May 11 17:23:52 mercury1 kernel: imapd[9664] trap divide error ip:407487
sp:7fff5fa64420 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9667] trap divide error ip:407487
sp:7fff0c8c7c90 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9668] trap divide error ip:407487
sp:7fffdd4ce590 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9670] trap divide error ip:407487
sp:7fff511f9b90 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9671] trap divide error ip:407487
sp:7fff821772f0 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9673] trap divide error ip:407487
sp:7fff6f737320 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9675] trap divide error ip:407487
sp:7fff30f1f7b0 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9672] trap divide error ip:407487
sp:7c44a3d0 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel: imapd[9678] trap divide error ip:407487
sp:7fffda1ffa50 error:0 in imapd[40+102000]
May 11 17:23:52 mercury1 kernel
Re: DNS load balancing
On 5/11/2010 5:35 AM, Andre Nathan wrote: > Hello > > I'm setting up a two-machine cyrus cluster using OCFS2 over DRBD. The > setup is working fine, and I'm now considering the load balancing > options I have. > > I believe the simplest option would be to simply rely on DNS load > balancing. However, for this to work, I need to consider what happens > when one of the cluster nodes fails, regarding the clients which access > the cluster: > > - Will IMAP and POP3 clients automatically try the second DNS entry if > connecting to the first one fails? > - Will the LMTP client also do this? I'm using the postfix LMTP client > for delivery. > > Does any one have experience with this kind of setup? > > DNS rollovers and particularly round-robin DNS solutions should not be considered IMO in modern HA datacenter practice. May work OK for a few hundred people and departmental servers, shows all it's warts for thousands. The logjam created when thousands of connections EACH have to timeout and rollover is not desirable. If you are doing a failover (active/passive) cluster then bring up a VIP for the service and have the VIP hostname be the official client point of contact. If you are doing active/active in some form then a proper load-balancer in front of your mail-store can do health checks and route client connections to servers known to be up. Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: email inaccessible through imap after reading
Hi, Quoting Martin Kraus : Hello. I'm having problem with emails being inaccessible through imap after reading it in outlook. The email file is still in the INBOX if I grep for it's mail id, but no imap client displays it. I've tried with mutt and pop3 but I couldn't find the email either. This server uses cyrus 2.3.14. I've never had any similar problems on any of my other servers. My guess is that outlook does something to the message to hide it from displaying but I've got no idea how to check this. If you use the delayed expunge feature of cyrus and the eMail gets deleted it stayes on the filesystem till cyr_expire removes them. See expunge_mode in imapd.conf Does anyone have any idea why would this happen? I guess Outlook is using POP and deletes the mail after download. Check your logfiles and/or use telemetry log for that user. Thanks Martin Kraus Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html M.MengeTel.: (49) 7071/29-70316 Universität Tübingen Fax.: (49) 7071/29-5912 Zentrum für Datenverarbeitung mail: michael.me...@zdv.uni-tuebingen.de Wächterstraße 76 72074 Tübingen smime.p7s Description: S/MIME Signatur Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: email inaccessible through imap after reading
On Tue, May 11, 2010 at 06:44:47PM +0200, Michael Menge wrote: > If you use the delayed expunge feature of cyrus and the eMail gets > deleted it stayes on the filesystem till cyr_expire removes them. > See expunge_mode in imapd.conf I'm not using expunge mode delayed. Haven't been able to get it to work it just segfaults when expunging. > I guess Outlook is using POP and deletes the mail after download. > > Check your logfiles and/or use telemetry log for that user. outlook uses imap and I've tried to access that mailbox using mutt both through imap and pop3 and I've also tried squirrelmail. The message is there, I can see it on the filesystem but it doesn't show up after being read. Since I've never had any similar problems with other cyrus servers, I'm inclined to say it is something outlook did to that message but I can't figure out what. If it deleted that message, it wouldn't be on the filesystem. mk Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: installing 2.3.16 on slackware64-13
On 11/05/10 17:23 +0100, James Meara wrote: >Hi, > >I'm trying to get cyrus imap running on new machine, I've compiled and >installed it without errors but when I start master the imapd processes >are dying immediately from what looks like a divide by zero error. >May 11 17:23:52 mercury1 kernel: imapd[9664] trap divide error ip:407487 >sp:7fff5fa64420 error:0 in imapd[40+102000] >May 11 17:23:52 mercury1 kernel: imapd[9667] trap divide error ip:407487 >sp:7fff0c8c7c90 error:0 in imapd[40+102000] >May 11 17:23:52 mercury1 kernel: imapd[9668] trap divide error ip:407487 >sp:7fffdd4ce590 error:0 in imapd[40+102000] >May 11 17:23:52 mercury1 kernel: imapd[9670] trap divide error ip:407487 >sp:7fff511f9b90 error:0 in imapd[40+102000] See http://cyrusimap.web.cmu.edu/imapd/install-upgrade.html Have you tried reconstructing your mailboxes? You can use the debug_command in imapd.conf to further trouble shoot. From Debian's README.Debian.debug.gz file: Attaching debuggers to Cyrus, and getting traces You can tell Cyrus services to run a debugging command just before they start doing real work. This can be used to run strace, ltrace and gdb or ddd (for interactive debugging and back-tracing) quite easily. Set the shell command to be run in /etc/imapd.conf, option debug_command. Then, add the command line switch "-D" to the Cyrus services you want to run the debug_command in /etc/cyrus.conf, and restart cyrmaster using /etc/init.d/cyrus2.3 restart. The debugging command must be given as a single line in the configuration file. To get a back-trace using gdb: debug_command: /usr/bin/gdb -batch -cd=/tmp -x /usr/lib/cyrus/getbacktrace.gdb /usr/lib/cyrus/bin/%s %d >/tmp/gdb-backtrace.cyrus.%1$s.%2$d <&- 2>&1 & The above will produce a back-trace of every service run with -D that segfaults in the files /tmp/gdb-backtrace.cyrus.*; /usr/lib/cyrus/getbacktrace.gdb simply has the sequence of commands for gdb: c (to continue running the service), bt (to get the back-trace if the program didn't exit normally), quit (to quit gdb). For strace, you can use: debug_command: /usr/bin/strace -tt -o /tmp/strace.cyrus.%s.%d -p %2$d <&- 2>&1 & Which will produce straces in /tmp/strace.cyrus.* -- Dan White Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
Re: email inaccessible through imap after reading
Quoting Martin Kraus : On Tue, May 11, 2010 at 06:44:47PM +0200, Michael Menge wrote: If you use the delayed expunge feature of cyrus and the eMail gets deleted it stayes on the filesystem till cyr_expire removes them. See expunge_mode in imapd.conf I'm not using expunge mode delayed. Haven't been able to get it to work it just segfaults when expunging. I guess Outlook is using POP and deletes the mail after download. Check your logfiles and/or use telemetry log for that user. outlook uses imap and I've tried to access that mailbox using mutt both through imap and pop3 and I've also tried squirrelmail. The message is there, I can see it on the filesystem but it doesn't show up after being read. Since I've never had any similar problems with other cyrus servers, I'm inclined to say it is something outlook did to that message but I can't figure out what. If it deleted that message, it wouldn't be on the filesystem. did you try an reconstruct on that mailbox? M.MengeTel.: (49) 7071/29-70316 Universität Tübingen Fax.: (49) 7071/29-5912 Zentrum für Datenverarbeitung mail: michael.me...@zdv.uni-tuebingen.de Wächterstraße 76 72074 Tübingen smime.p7s Description: S/MIME Signatur Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
