- dovecot - dovecot.org

[Dovecot] proxy performance
by Vincent Fox 19 Jul '06

19 Jul '06

Can anyone speak to experience using Dovecot proxy to frontend for multiple back-end servers in a "large" environment? We have 50,000+ mailboxes spread across 10 POP/IMAP servers. We'd like to be able to put in a front-end setup on our load-balancer of 4 dual-CPU Sun systems. I am a bit concerned about performance issues although from what I have read the proxy can be set not to fork, which improves performance a lot. Still concerned about whether SSL loading will be an issue. We'd like to use LDAP to look up the reference to which mail-store a user is on. I see that the Wiki refers to SQL. The mailing list indicates passwd-file also works. Not clear about LDAP.

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[Dovecot] /var/spool/mail directory size and subdirectories
by David Lee 19 Jul '06

19 Jul '06

(Complete newbie to dovecot. I hope what follows isn't something I've missed in some FAQ somewhere...) On a traditional UNIX filesystem with UW-IMAP several years ago, we encountered major performance problems when "/var/spool/mail/" got big (we would currently be ~20,000 entries). This was due to the inefficiency of the UNIX filesystem when creating and deleting the lockfiles (etc.) in a directory of that size. We worked around that (all those years ago) with a local source-code mod to UW-IMAP ("c-client") to use subdirectories "/var/spool/mail/00/" to "/var/spool/mail/99/" based on a trivially simply "uid mod 100" algorithm. (Our uids are random; our usernames are not.) Thus we had 100 subdirs each of about 200 entires. Efficiency and performance vastly improved, and we've been running like that ever since. Now we are considering migrating to dovecot... Does dovecot do file creation/deletion in this (or similar shared) directory? (And so would it be liable to the same inefficiency problems?) Is there some means in the "dovecot.conf" file to specify an INBOX pattern as "/var/spool/mail/%ZZZ%/%u" where "%ZZZ%" could be algorithmically specified as (say) "user-uid mod 100"? -- : David Lee I.T. Service : : Senior Systems Programmer Computer Centre : : Durham University : : http://www.dur.ac.uk/t.d.lee/ South Road : : Durham DH1 3LE : : Phone: +44 191 334 2752 U.K. :

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[Dovecot] Dovecot] Error appear when Update Dovecot-0.99.14-r1 to Dovecot-1.0.rc2
by Dario Ale 19 Jul '06

19 Jul '06

Hello! Today, I tried to update Dovecot, initially everything pretended to be OK, but after update I see dovecot.log and found this line: " dovecot: Jul 18 11:26:03 Error: IMAP(dario.a(a)telpin.com.ar): file istream-raw-mbox.c: line 485 (istream_raw_mbox_get_body_size): assertion failed: (rstream->mail_size != (uoff_t)-1) " This line is repeated for many users, then I had to return to Dovecot-0.99.14-r1. This is my condiguration file for Dovecot-1.0.rc2: " base_dir = /var/run/dovecot/ protocols = pop3 pop3s imap imaps listen = * disable_plaintext_auth = no shutdown_clients = yes log_path = /var/log/dovecot.log info_log_path = /var/log/dovecot.log ssl_listen = * ssl_disable = no ssl_cert_file = /etc/ssl/dovecot/dovecot.crt ssl_key_file = /etc/ssl/dovecot/dovecot.key login_chroot = yes default_mail_env = mbox:%h:INDEX=/etc/dovecot/dovecot-indexes%h:INBOX=%h.mbox mail_extra_groups = vmail mail_read_mmaped = yes mmap_disable = yes lock_method = dotlock valid_chroot_dirs = %h mail_save_crlf = no mbox_read_locks = dotlock mbox_write_locks = dotlock protocol imap { } protocol pop3 { pop3_uidl_format = %v%u } auth default { mechanisms = plain passdb sql { args = /etc/dovecot-mysql.conf } userdb sql { args = /etc/dovecot-mysql.conf } user = root } " I am using NFS for Mboxes, no for INDEX Files. Please, could somebody help me? Thanks. -- Dario Ale (dario.a en telpin.com.ar)

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[Dovecot] data corruption in delivery agent when forwarding
by Joshua Goodall 19 Jul '06

19 Jul '06

Hi Timo I've been seeing data corruption in the lda when forwarding mail. I think it's due to confused file pointers. (this is all maildirs on nfs) Anyway the following patch fixes it, and also looks a bit more like the old dovecot-lda module, by getting the Return-Path header before getting the input stream: Index: mail-send.c =================================================================== RCS file: /home/cvs/dovecot/src/deliver/mail-send.c,v retrieving revision 1.1.2.1 diff -u -r1.1.2.1 mail-send.c --- mail-send.c 11 Jun 2006 11:10:55 -0000 1.1.2.1 +++ mail-send.c 19 Jul 2006 09:28:18 -0000 @@ -116,16 +116,17 @@ struct smtp_client *smtp_client; FILE *f; const unsigned char *data; + const char *return_path; size_t size; int ret; + return_path = mail_get_first_header(mail, "Return-Path"); + input = mail_get_stream(mail, NULL, NULL); if (input == NULL) return -1; - smtp_client = smtp_client_open(forwardto, - mail_get_first_header(mail, "Return-Path"), - &f); + smtp_client = smtp_client_open(forwardto, return_path, &f); input = i_stream_create_header_filter(input, HEADER_FILTER_EXCLUDE | HEADER_FILTER_NO_CR, hide_headers, best regards as ever /k -- Josh "Koshua" Goodall "as modern as tomorrow afternoon" joshua(a)roughtrade.net - FW109

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[Dovecot] strange dropping of Word.doc-attachements - sendmail dovecot RHEL4
by Götz Reinicke 19 Jul '06

19 Jul '06

Hi, we have a strange problem: two of our users informed me, that they aren't able to send word-.doc-files anymore while othe attachements work fine. The e-mail gets deliverd, but the attachement is dropped. This happens using the latest thunderbird 1.5.x and mac os x. The e-mail is also not saved in the send-drawer. If the users send the same e-mail to the same recepient using an other mailclient, there is no problem. Other users (like me) using the same systemsettings and software versions don't have the problem. The server is RHEL 4 (2.6.9-kernel), sendmail 8.13.1 and dovecot 0.99. We use Mailscanner and spamassassin too, but as only the two users do have the problem I'm looking for some help to track this problem down. Any ideas?? Thanks and best regards Götz Reinicke -- Götz Reinicke IT Koordinator Tel. +49 7141 969-420 Fax +49 7141 969 55-420 goetz.reinicke(a)filmakademie.de Filmakademie Baden-Württemberg Mathildenstr. 20 71638 Ludwigsburg www.filmakademie.de

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Re: [Dovecot] Empty messages in 1.0RC2
by Apostolos Papayanakis 19 Jul '06

19 Jul '06

Renaud Allard wrote: > Message: 1 > Date: Tue, 18 Jul 2006 10:03:28 +0200 > From: Renaud Allard > Subject: [Dovecot] Empty messages in 1.0RC2 > To: dovecot(a)dovecot.org > Message-ID: <44BC95D0.8020800(a)llorien.org> > Content-Type: text/plain; charset="iso-8859-1" > > Hello, > > I am running 1.0RC2 (upgrade from a beta, so I haven't tested RC1 > unfortunately). I sometimes get empty messages in my inbox folder. Mails > are stored using Maildir. Here is an output of a ls -la ~/Maildir/cur > > -rw------- 1 n users 0 Jul 18 09:31 > _CFC+Y5IvEB.gandalf.llorien.org:2, > -rw------- 1 n users 0 Jul 18 09:28 > _bEG+A2IvEB.gandalf.llorien.org:2, > -rw------- 1 n users 0 Jul 18 09:54 > _ezF+eOJvEB.gandalf.llorien.org:2, > -rw------- 1 n users 2246 Jul 18 08:10 msg.f23:2,RSa > > There is one real message (the last one). All messages seems to have > strange file names names, even the real one. Messages delivered by the > MTA generally have a name like > 1152736772.H956194P17632.mail.llorien.org:2,RS > > There is nothing in the SMTP server logs that could suggest these empty > mails are delivered with SMTP and only dovecot version has changed. So I > guess this is dovecot related. My IMAP client is thunderbird on Linux, > but I have also seen the problem with sylpheed on OpenBSD. > > Any help or hint appreciated. > > These filenames mey be related to procmail temporary files created during delivery: Try an strace (or equivalent) like this: $ strace procmail </dev/null 2>&1|grep O_EXCL open("/var/mu/apap/Maildir/_YgG.ZvMvEB.hyperion", O_WRONLY|O_CREAT|O_EXCL, 0444) = 6 ... Are you using procmail? If yes, something may be breaking it. Apostolis Papagiannakis

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[Dovecot] Soft Quota - HELP
by Philipe Gaspar 18 Jul '06

18 Jul '06

I'm using dovecot on our new mail server and it is pretty good. But I have a problem regarding quota limits, I am using quota plugin on imap, pop3 and LDA, the deliver agent blocks new messages for delivery, like hard quota. I'd like to use LDA with quota plugin regarding soft quota. Thanks for any clues,

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[Dovecot] Masking INBOX.INBOX
by Ben Schumacher 18 Jul '06

18 Jul '06

I am using dovecot and trying to make it compatible with my a BincIMAP installation. BincIMAP uses a scheme similar to Courier-IMAP, so I set up this default_mail_env: default_mail_env = maildir:~/Maildir And this namespace: namespace private { separator = . prefix = INBOX. inbox = yes } Which mostly works as expected, but I now see an "INBOX" subfolder of "INBOX" in LIST: * OK Dovecot ready. 1 login ben ******** 1 OK Logged in. 2 list "" "*" * LIST (\HasChildren) "." "INBOX" * LIST (\HasNoChildren) "." "INBOX.INBOX" * LIST (\HasNoChildren) "." "INBOX.Drafts" * LIST (\HasChildren) "." "INBOX.Jabber" * LIST (\HasChildren) "." "INBOX.Keepers" * LIST (\HasChildren) "." "INBOX.Ruby" * LIST (\HasNoChildren) "." "INBOX.Trash" * LIST (\HasNoChildren) "." "INBOX.Sent" * LIST (\HasNoChildren) "." "INBOX.Spam" * LIST (\HasNoChildren) "." "INBOX.postmaster" * LIST (\HasNoChildren) "." "INBOX.qmail" * LIST (\HasNoChildren) "." "INBOX.Jabber.XMPPWG" * LIST (\HasNoChildren) "." "INBOX.Jabber.standards-jig" * LIST (\HasNoChildren) "." "INBOX.Keepers.2003" * LIST (\HasNoChildren) "." "INBOX.Keepers.2004" * LIST (\HasNoChildren) "." "INBOX.Keepers.2005" * LIST (\HasNoChildren) "." "INBOX.Ruby.ruby-talk" 2 OK List completed. Is there anyway to mask this from displaying? I've toyed with various configurations to try to hide it, but nothing seems to work. What's annoying is this situation: 3 LSUB "" "*" * LSUB () "." "INBOX.Spam" * LSUB () "." "INBOX.Trash" * LSUB () "." "INBOX.Sent" * LSUB () "." "INBOX.Drafts" 3 OK Lsub completed. 4 SUBSCRIBE "INBOX" 4 OK Subscribe completed. 5 LSUB "" "*" * LSUB () "." "INBOX.Spam" * LSUB () "." "INBOX.Trash" * LSUB () "." "INBOX.Sent" * LSUB () "." "INBOX.Drafts" * LSUB () "." "INBOX.INBOX" 5 OK Lsub completed. Note that in my first LSUB the main "INBOX" isn't subscribed to. I then "SUBSCRIBE" in 4 to "INBOX" and dovecot translates that to subscribing to "INBOX.INBOX". Not a huge deal, but it does cause Thunderbird to act weirdly (although Thunderbird allows me to UNSUBSCRIBE to "INBOX" and still get new mail), but I'm not sure what the effect will be on other clients. Any ideas? Thanks, Ben

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[Dovecot] POP3: Keep a copy on server failed ...
by Dominique Feyer 18 Jul '06

18 Jul '06

I have a big problem with our cluster, if i read my mail with POP3 client (and check the option, keep a copy on server), every time I read my mail, my client retrive ALL messages an the mailbox !!! I test this with: - Apple Mail 1.0 + 2.0 - M$ Outlook 2000 + 2003 - Thunderbird We use: - Dovecot RC1 - Postfix on Debian Sarge (stable) Can you know this bug ? Or have a workaround ? This function is really important for our customer as we offer a backup solution for her mails. Thanks -- Net4all S.A. Dominique Feyer Administrateur Système Ch. de la Colline 5bis CH-1007 Lausanne dfeyer(a)net4all.ch

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[Dovecot] startup script
by Pid 18 Jul '06

18 Jul '06

Hi, Could someone please post an example of a /etc/init.d/dovecot startup script? (We use fedora core 5, if that makes any difference.) Ours seems to be missing. Cheers, Pid

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