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seth vidal wrote: | On Thu, 2004-04-08 at 17:26, James Moser wrote: | |>We just started using it on a system with more than 50,000 users and it |>works quite nicely. Migrating from uw-imap to dovecot caused a few |>problems with some user's mail clients, like Mozilla mail based clients |>issued command that cuased the server to respond with "Invalid mask", |>and Eudora's SASL AUTH doesn't seem to work with the pop server, but |>other than that it seems to work great. |> | | | Just b/c I'm curious (and if you want take this offlist is fine) what's | your setup look like for this system? Do you have a whitepaper or a | layout for it?

Please use the list.

Also, I am interested in the migration process. If you used scripts (like switch from mbox to Maildir) then which one(s), and did you do some finetuning to them? Did you use the "move to mbox" feature of uw-imap, and if you did how did you handle that when you switched?

Any tricks and experiences are much appreciated.

~ - Jonas

• Jonas Smedegaard - idealist og Internet-arkitekt
• Tlf.: +45 40843136 Website: http://dr.jones.dk/

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Jonas Smedegaard wrote:

Also, I am interested in the migration process. If you used scripts (like switch from mbox to Maildir) then which one(s), and did you do some finetuning to them? Did you use the "move to mbox" feature of uw-imap, and if you did how did you handle that when you switched?

Feel free to search the archives - I recently did a mbox to Maildir conversion, and posted the scripts I used to accomplish this. It worked well in my environment - and was able to traverse a few levels down for uses who had sub-folders.

-Rick

Rick Johnson, RHCE #807302311706007 - rjohnson@medata.com Linux/Network Administrator - Medata, Inc. PGP Public Key: https://mail.medata.com/pgp/rjohnson.asc

I'll tell ya anything you wanna know... I'm using FreeBSD 4.9, here is my how I currently configuered it (didn't use the ports)..

./configure --without-shadow --without-pam --without-passwd-file --without-static-userdb --disable-ipv6 --localstatedir=/var
--with-ssl=openssl --with-ssldir=/var/dovecot/ssl --with-pop3d --with-storages=mbox

I had the default configure options working too, I just wanted to remove everything I didn't need to increase performance, maybe it doesn't matter... I didn't see much of a change.

We are currently using mbox, and hopefully someday will be converting to maildir, but one step at a time... this is actually one of the reasons I choose to try dovecot.

My dovecot.conf configuration is attached... mostly defaults with some exceptions.... if anyone has some recommendations that'd be great... I have all caching turned off for Imap for other reasons, but it might work fine for you.

seth vidal wrote:

On Thu, 2004-04-08 at 17:26, James Moser wrote:

...

We just started using it on a system with more than 50,000 users and it works quite nicely. Migrating from uw-imap to dovecot caused a few problems with some user's mail clients, like Mozilla mail based clients issued command that cuased the server to respond with "Invalid mask", and Eudora's SASL AUTH doesn't seem to work with the pop server, but other than that it seems to work great.

Just b/c I'm curious (and if you want take this offlist is fine) what's your setup look like for this system? Do you have a whitepaper or a layout for it?

Thanks, -sv

-- James L Moser james@powweb.com PowWeb Hosting http://www.powweb.com

/(bb|[^b]{2})/, that is the Question.

mysql>SELECT * FROM user WHERE clue > 0; Empty set (0.03 sec)

Health is merely the slowest possible rate at which one can die... Health nuts are going to feel stupid someday, lying in hospitals dying of nothing...

base_dir = /var/dovecot/ protocols = imap imaps pop3 pop3s

imaps_listen = * pop3s_listen = *

ssl_cert_file = /var/dovecot/ssl/certs/imapd.pem ssl_key_file = /var/dovecot/ssl/private/imapd.pem ssl_parameters_file = /var/dovecot/ssl/parameters.dat login_dir = /var/dovecot/login login_chroot = yes

login = imap login_executable = /usr/local/libexec/dovecot/imap-login login_user = dovecot login_process_size = 0 login_process_per_connection = no login_processes_count = 1

login = pop3 login_executable = /usr/local/libexec/dovecot/pop3-login verbose_proctitle = yes verbose_ssl = yes

first_valid_uid = 500 first_valid_gid = 500 valid_chroot_dirs = /var/mail default_mail_env = mbox:%h:INBOX=/var/mail/%u mail_cache_fields = mail_never_cache_fields = MessagePart Bodystructure Body Envelope client_workarounds = oe6-fetch-no-newmail outlook-idle mailbox_check_interval = 0 mailbox_idle_check_interval = 0 mail_full_filesystem_access = no

# Save mails with CR+LF instead of plain LF. This makes sending those mails # take less CPU, especially with sendfile() syscall with Linux and FreeBSD. # But it also creates a bit more disk I/O which may just make it slower. mail_save_crlf = yes

maildir_copy_with_hardlinks = yes maildir_check_content_changes = no mbox_locks = fcntl

imap_executable = /usr/local/libexec/dovecot/imap pop3_executable = /usr/local/libexec/dovecot/pop3

auth = default auth_mechanisms = plain

auth_userdb = passwd auth_passdb = passwd

auth_executable = /usr/local/libexec/dovecot/dovecot-auth auth_user = root auth_count = 5 auth_verbose = yes

That was 50,221 users on one dual processor (PIII 3.02Ghz Xeon) dell 2650 with 4gigs of ram. I'm not sure about concurrent users, but we have as many as 10 to 15 authenticated connections per second.

mail01# tail -f /var/log/maillog |grep Login Apr 8 22:07:57 mail01 pop3-login: Login: tinamc [66.74.103.232] Apr 8 22:07:57 mail01 pop3-login: Login: rsqm [66.130.185.91] Apr 8 22:07:57 mail01 pop3-login: Login: jbenalluch [69.140.148.204] Apr 8 22:07:57 mail01 pop3-login: Login: mrjensen [24.0.200.132] Apr 8 22:07:57 mail01 pop3-login: Login: papabear3 [67.38.17.200] Apr 8 22:07:57 mail01 pop3-login: Login: guetta [68.161.98.196] Apr 8 22:07:57 mail01 pop3-login: Login: 10807.postma [24.20.89.23] Apr 8 22:07:58 mail01 pop3-login: Login: ddove [12.202.143.197] Apr 8 22:07:58 mail01 pop3-login: Login: 12061.sarah [66.214.64.87] Apr 8 22:07:58 mail01 pop3-login: Login: lmcooper [148.64.10.179] Apr 8 22:07:58 mail01 pop3-login: Login: k2kast [68.232.127.204] Apr 8 22:07:58 mail01 pop3-login: Login: 4835.uspromo [68.224.241.105] Apr 8 22:07:58 mail01 pop3-login: Login: hnconner [209.17.161.60] Apr 8 22:07:58 mail01 pop3-login: Login: kbechtel [216.153.176.93] Apr 8 22:07:58 mail01 pop3-login: Login: jolthoff [12.219.166.42] Apr 8 22:07:58 mail01 pop3-login: Login: beta [64.203.14.99] Apr 8 22:07:58 mail01 pop3-login: Login: 14185.joe [141.158.63.80] Apr 8 22:07:58 mail01 pop3-login: Login: threebearsjunc [67.38.17.200] Apr 8 22:07:58 mail01 pop3-login: Login: valcarcel [24.184.87.216] Apr 8 22:07:58 mail01 pop3-login: Login: eintec [24.184.87.216] Apr 8 22:07:59 mail01 pop3-login: Login: wardbaxter [24.20.97.47] Apr 8 22:07:59 mail01 imap-login: Login: orangeweb [66.152.97.131] Apr 8 22:07:59 mail01 pop3-login: Login: wlmeyer [69.165.47.173] Apr 8 22:07:59 mail01 pop3-login: Login: 654.amanda [4.242.102.192] Apr 8 22:07:59 mail01 pop3-login: Login: rca_email [66.38.89.33] Apr 8 22:07:59 mail01 pop3-login: Login: christy2 [66.75.155.254] Apr 8 22:08:00 mail01 pop3-login: Login: drolthoff [12.219.166.42] Apr 8 22:08:00 mail01 pop3-login: Login: grant2720 [68.56.3.132] Apr 8 22:08:00 mail01 pop3-login: Login: jbenalluch [69.140.148.204] Apr 8 22:08:00 mail01 pop3-login: Login: joyce465321 [66.82.195.158]

This mail server hosted just over 12,000 virtual domains.... handles thoasands of messages per hour. postfix is running on the same system. Its running beautifully too... I've converted over three more systems with almost identical environments...

seth vidal wrote:

On Thu, 2004-04-08 at 14:57 -0700, James Moser wrote:

...

I'll tell ya anything you wanna know... I'm using FreeBSD 4.9, here is my how I currently configuered it (didn't use the ports)..

I'm actually curious about:

1. how many systems?
2. how many concurrent users?
3. what type of hw is this on?
4. what type of mail volume do you have to deal with?

Thanks for all the info - the central powers at duke that be just went through a fairly massive mail system migration and I'm just curious about other systems of similar scale 50K users is similar scale.

Thanks -sv

-- James L Moser james@powweb.com PowWeb Hosting http://www.powweb.com

/(bb|[^b]{2})/, that is the Question.

mysql>SELECT * FROM user WHERE clue > 0; Empty set (0.03 sec)

Health is merely the slowest possible rate at which one can die... Health nuts are going to feel stupid someday, lying in hospitals dying of nothing...

I am very impressed as well by dovecot... But the only feature missing is Softquota Maildir++ support.

I had in the idea to add a plugin for dovecot, using Laurent Wacrenier mdq library, but the example on dovecot's website doesn't ever seems to works.

You can find this library there : http://pll.sourceforge.net/man.mdq.html / http://pll.sourceforge.net/ .

How do people in production environment works with quota ? Especialy softquota, since for my point of vue system quota can't deal with my own systems....

/Xavier

Jared wrote:

One other concern which worries me a little, is that the primary developer Timo seems to have gotten busy or uninterested recently. He was clearly going above and beyond by responding to every question within minutes, but looking at the archives recently he is posting a lot less. I just hope he's busy and not burned out because his work on dovecot is amazing.

Timo posted recently and said:

Sorry about the lack of replies to questions in this list. Work on the new indexing code has taken way too long, but it's finally beginning to be get near usable state. After it's fully working, I'll start being more active here again.

So I hope that he will be increasingly active on the list again, but there's little point in second guessing the reasons for his absence.

I also am increadably impressed with Dovecot so far, and would like to use it in larger installations once its small outstanding problems are fixed and it reaches 1.0.

Andrew

<quote who="Jared"> > I am running it in a production environment with about 500 users. I > wasn't particularly excited about running pre 1.0 pop3 imap server > software but it had all the features I was after. > > I was looking for: > > - LDAP authentication > - POP3, POP3S, IMAP, IMAPS > - mbox support (simultaneous support for maildir is also nice since > we'll hopefully migrate sometime soon.) > - easy but powerful configuration > - a nice responsive developer and support community > - uw-imap compatibility (that's what we were running before) > - written with security in mind > - good documentation > - open source and Free > > It's also nicely packaged for debian by the nice folks at > braincells.com. > > I've been mostly happy. Some things still feel a little fragile. > We've had corrupted mboxes a few times, but I haven't had time to > figure what is at fault. I suppose certain pop clients could be the > problem. The LDAP authentication doesn't seem to work well with > stunnel. Other than these few small blips, it's been running flawlessly > for over 8 months. > > One other concern which worries me a little, is that the primary > developer Timo seems to have gotten busy or uninterested recently. He > was clearly going above and beyond by responding to every question > within minutes, but looking at the archives recently he is posting a > lot less. I just hope he's busy and not burned out because his work on > dovecot is amazing. > > -jared > > > On Apr 8, 2004, at 5:04 PM, Avery Day wrote: > >> >> Sorry if this question has been asked before I looked through some of >> the >> archives before posting this. >> >> I am considering using dovecot on a small 35 user environment (only >> around >> 6 gigs of email) that will be primarly be used with squirrelmail for >> the >> MUA. I have been using dovecot for a few weeks now and really like it. >> It >> is a big improvement over uw-imap thats for sure. I was wondering how >> many >> people in this mailing list are using dovecot for a production email >> server, and why you chose to use dovecot over cyrus or courier. Or >> maybe >> someone feels that dovecot isnt ready for this type of thing just yet. >> I >> am all ears so please feel free. >> >> Thanks >> -- >> Avery >> >> >> >> -- >> Avery Day >> > >

quote:

corrupted mboxes

Well thats not cool at all. I have been dealing with corrupt mailboxes for the last year on our exchange server. Infact I will be migrating the entire email system from exchange server to a postfix+dovecot+spamassassin+procmail+mailfilter setup hopefully in the next month or two. But hearing about corrupt mailboxes sends shivers up my spine. Infact I didn't think it was possible to have corruption or at least next to impossible with a unix type mailbox systems.

-- Avery Day