- dovecot - dovecot.org

[Dovecot] Migrating to dovecot
by Johann Spies 21 Jul '06

21 Jul '06

I do not have much experience in setting up imap servers - only that I have tried several and experienced the same problem with all of them. I suppose that is because I do not really know the in's and out's of an imap server. What I want to do is to setup an IMAP server on my PC with full access to all the emails already there in a maildir structure. I have the following setup: fetchmail -> procmail -> maildir exim for outgoing mail. When I install an imap server, I loose access to my present emails in ~/Mail and most imap-servers (dovecot included) seems to create a new structure within ~/Mail. ~/Maildir is a symlink to ~/Mail. Now my questions: 1. How do I set up dovecot to serve the present maildir to the user? 2. Related to 1: How do I migrate my emails to the new imap-maildir structure without losing any? 3. How would my present procmail-setup change? At the moment I have entries like the following: MAILDIR=$HOME/Mail # you'd better make sure it exists DEFAULT=$MAILDIR/Ander/new # completely optional :0: * X-Spam-Flag: YES saspam/new :0: * ^List-Id: <users.spamassassin.apache.org> spamassassin/new ... Regards Johann -- Johann Spies Telefoon: 021-808 4036 Informasietegnologie, Universiteit van Stellenbosch "God is our refuge and strength, a very present help in trouble." Psalms 46:1

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[Dovecot] Soft limit quota
by Philipe Gaspar 20 Jul '06

20 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, -- Philipe Gaspar Universidade Salvador Fone:+55 (71) 3273-8592

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[Dovecot] Patch suggestion
by Renaud Allard 20 Jul '06

20 Jul '06

Hi, Would it be possible to make a change in the configure file to search for gssapi.h in <kerberosV/gssapi.h> if it fails to find it in <gssapi/gssapi.h>? That would allow to compile dovecot with gssapi easily on OpenBSD without patching it.

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[Dovecot] making Dovecot match Courier POP3 UID's
by Jeff Tucker 20 Jul '06

20 Jul '06

Hi, guys. I've read the information in the Wiki about making dovecot's UID's match Courier's UID's in the POP3 server, so that a UIDL command on either server will return the same UID's for the same group of messages. However, what I've read doesn't match what I'm seeing in Courier. Courier appears to keep the UID numbers for messages that it uses for the POP3 server separate from the UID numbers for the IMAP server. Courier has a file: courierpop3dsizelist which has a line for every message, like: 1129610881.6075832619.blade4:2,S 2361 1478:1065670602 1129727025.1168007000.blade1:2,S 14718 1479:1065670602 1130005953.3295720403.blade5:2,S 1554 1481:1065670602 1130108068.0849623942.blade5:2,S 8246 1482:1065670602 The first column is the maildir filename, the last column is the UID that the POP3 server uses and the UID validity. Both are used to create the UID number returned by UIDL. The IMAP server uses a completely different UID number that's stored in courierimapuiddb. So, it seems to me that dovecot can't ever match Courier's UID numbers for the POP3 server unless it reads and interprets this courierpop3dsizelist file. My Courier-IMAP installation is Courier-IMAP 4.0.6. Any ideas? This is a real hassle because it means I can't switch the POP3 server from Courier to Dovecot or, if I do, lots of my users will download every message again which is just unacceptable. Thanks Jeff

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[Dovecot] [PATCH] Masking INBOX.INBOX
by Ben Schumacher 20 Jul '06

20 Jul '06

On 7/18/06, Ben Schumacher <me(a)benschumacher.com> wrote: > Any ideas? I fixed this behavior with the attached patch. It's really a slight rework of the logic in imap/cmd-list.c. I hope somebody else finds it useful! Cheers, Ben

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[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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