- dovecot - dovecot.org

[Dovecot] Upgrade/Migration
by sottilette＠rfx.it 30 Dec '11

30 Dec '11

Current box: CentOS 4.x (32 bit), dovecot 1.02, mbox format New box (supposed): CentOS 6.x (32/64 bit ? ), dovecot 2.04, mbox format The server have about 3.000 active users (unix users); /var/mail is about 100 GB; /home/Users about 150 GB I read the docs and searched on the net, but still request hints for planning the migration. 32/64 bit? Tricks to avoid users get all messages ...? Better first update the old server from 1.02 to 2.0x or ..? Any hints/comment appreciated ;-) Thanks, P. 1.02 dovecot.conf: ----------------------- protocols = pop3 pop3s imap imaps listen = [::] log_path = /var/log/mail/dovecot.log info_log_path = /var/log/mail/dovecot.info.log log_timestamp = "%b %d %H:%M:%S " default_mail_env = mbox:~/:INBOX=/var/mail/%u mail_full_filesystem_access = yes first_valid_uid = 100 mbox_read_locks = dotlock fcntl mbox_write_locks = dotlock fcntl auth default { mechanisms = plain passdb pam { } userdb passwd { } user = root } -----------------------

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[Dovecot] mbox, hierarchical folders/folders and IMAP
by Alexander Chekalin 30 Dec '11

30 Dec '11

Hello, I'm now dealing with funny problem. I try to use Dovecot (2.1.rc1, actually) and mbox format to store old mailing, to keep logic of "one folder = one file". If I'd choose Maildir, I'd be able to create hierarchical folders (like "OldMail -> Maillists -> Dovecot"), and in fact on disk such a folders would be stored as real folders with dots in their names. In PHP it is easy to create with "imap_createmailbox()" function, I'd simple fire it 3 times (for "OldMail", for "OldMail.Maillists" and for "OldMail.Maillists.Dovecot"). But when I do the same with mbox, in fact it creates separate files (indeed, named "OldMail", "OldMail.Maillists" and "OldMail.Maillists.Dovecot") instead of creating filesystem folders ("OldMail/Maillists/Dovecot"). PHP is not guilty, Thunderbird won't create such folders as well. I can only create folders myself (say, with mkdir in the shell), chown it, and the it perfectly works in IMAP. Now I just wanted to know, are there any way to create IMAP-folders and subfolders using standard IMAP functionality? Thank you, Alexander

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[Dovecot] Using Amazon S3 storage for Maildir ?
by Forrest Aldrich 30 Dec '11

30 Dec '11

I wonder if anyone has tried using an IMAP server with Amazon S3 as a backend. There would be many factors to consider (speed, etc). However, moreso, I don't know that Maildir(++) would support multiple folders that might be linked into the cloud. For example, higher-I/O local incoming mail is on disk, some folders archived on S3. Could be easily done by simply creating another account and storing its Maildir in S3 -- Curious....

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[Dovecot] How to serve a subset of IMAP folders for hand held devices.
by David Pottage 30 Dec '11

30 Dec '11

Hello I am currently running dovecot 1.2.15 on my home server. I have over 200 folders in personal email account, and I have found that my smart-phone does not work well trying to display that many folders. I solved the problem by creating a second instance of dovecot running on a non standard port, and configured it to serve only a subset my email folders, so that way the email client on my smartphone works well and I can read the emails I am interested in on the move. The process of configuring two instances of dovecot on the same machine serving different views of the same mailbox was faily complex, so I think it would be worth documenting the process in an FAQ or suchlike for other users. I thought a good place to write up my method would be in the HowTo section of the Dovecot Wiki. Is that a good idea? Can I request an account to edit the Wiki, or should I send a draft text to an editor? Are there any Dovecot experts here who can review my methods and suggest improvements? -- David Pottage

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[Dovecot] /usr/lib/dovecot/imap ignores log settings?
by Asheesh Laroia 29 Dec '11

29 Dec '11

Hi Dovecot peeps, I'm enjoying running /usr/lib/dovecot/imap directly as a PREAUTH IMAP pipe. I find that it outputs log messages whose severity is INFO to stdout. I'm running it as follows: /usr/lib/dovecot/imap -c /tmp/dovecot.conf and I see the following messages output to stdout: * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS] Logged in as paulproteus imap(paulproteus): Info: Connection closed bytes=0/305 Naturally, the first line is great. My /tmp/dovecot.conf is: <cut here> # single-dbox mail_location = sdbox:~/Maildir/dbox log_path = syslog info_log_path = /dev/null </cut> I'm also attaching strace output, created by running this command: echo | strace /usr/lib/dovecot/imap -c /tmp/dovecot.conf > /tmp/straced 2>&1 (The point of the "echo | " is to provide a newline and then EOF to /usr/lib/dovecot/imap.) You can see in the strace output that /usr/lib/dovecot/imap outputs the "Connection closed" message to file descriptor 2. I'd like that message to actually not be printed, which is why I set log_path to syslog. -- Asheesh.

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[Dovecot] Dsync Error Can't Delete Mailbox
by Asai 29 Dec '11

29 Dec '11

Greetings, I'm getting this error in the dsync logs: Warning: Destination mailbox INBOX has been modified, need to recreate it before we can continue syncing dsync(foo(a)bar.org): Error: Can't delete mailbox INBOX: INBOX can't be deleted. In this situation, what should I do to remedy the problem? Just delete the backup and rebuild? -- --asai

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[Dovecot] Received date no longer email date?
by Brian L. Matthews 29 Dec '11

29 Dec '11

I just upgrade from dovecot 1.2 to dovecot 2.0.16. I use dovecot as a local IMAP server to archive email from my corporate email account (on Exchange). I don't have any automated archiving, I just periodically move messages from my Exchange inbox to the IMAP inbox. I'm on Mac OS X 10.6.8 using Entourage as my mail client. In the previous version of dovecot, the Received date of the email was preserved when I moved a message, but it's not in 2.0.16, it's set to the date and time I move the message. If I open a message, the date displayed is the date on the message as expected. I converted my config from 1.2 with $ doveconf -n -c dovecot.conf > dovecot-2.conf It spit out various warnings but, once I'd created a dovenull user, seemed to work fine. Here's my configuration info: $ dovecot --version 2.0.16 $ dovecot -n # 2.0.16: /usr/local/etc/dovecot/dovecot.conf # OS: Darwin 10.8.0 i386 disable_plaintext_auth = no listen = 127.0.0.1 log_path = /var/log/dovecot.log mail_location = maildir:~/Maildir passdb { args = login driver = pam } service auth { user = root } service imap-login { process_limit = 16 } service imap { process_limit = 64 } ssl = no userdb { driver = passwd } I'd like to get it back to preserving the Received date, any help you can provide will be appreciated. Brian

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[Dovecot] proxying, SSL, and client certificate
by Mike Abbott 29 Dec '11

29 Dec '11

How do I configure dovecot-2.0.x to present a client SSL certificate when proxying? If dovecot on server1.example.com has: passdb { driver = static args = proxy=y host=server2.example.com nopassword=y ssl=yes } and dovecot on server2.example.com has: ssl_verify_client_cert = yes auth_ssl_require_client_cert = yes then when a client connects to server1 and authenticates, a connection is established to server2 but the SSL handshake fails because server1 doesn't present a client certificate. I don't see where ssl_client_ctx is tied to a client certificate in ssl-proxy-openssl.c. Thanks.

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[Dovecot] Lucene vs Solr with 2.1 single server
by Daniel L. Miller 29 Dec '11

29 Dec '11

For a single server, is the Lucene backend now "better" than running a Solr server? -- Daniel

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[Dovecot] Dovecot imap proxy to nginx, incompatible
by David Jonas 29 Dec '11

29 Dec '11

It appears that using dovecot to proxy to nginx imap proxy doesn't work. >From tcpdump and browsing the source it appears dovecot sends, C CAPABILITY\r\nL LOGIN <user> <pass>\r\n and nginx only responds to the CAPABILITY command. Is this a problem with dovecot sending the two commands without waiting for the first to complete or is it nginx's trouble with not handling it correctly? A quick test with a perl script confirms: #!/usr/bin/perl -w $|++; use IO::Socket; use strict; my ($host, $user, $pass) = @ARGV; my $s = new IO::Socket::INET(Proto => 'tcp', PeerAddr => $host, PeerPort => 143); die "Could not create socket $!\n" unless $s; while(<$s>) { print $_; last if /OK/; } print $s "C CAPABILITY\r\nL LOGIN $user $pass\r\n"; while(<$s>) { print $_; last if /OK/; } print $s "Q logout\r\n"; while(<$s>) { print $_; last if /OK/; } close($s); ## Output: * CAPABILITY IMAP4rev1 SASL-IR SORT THREAD=REFERENCES MULTIAPPEND UNSELECT LITERAL+ IDLE CHILDREN NAMESPACE LOGIN-REFERRALS UIDPLUS LIST-EXTENDED I18NLEVEL=1 QUOTA AUTH=PLAIN C OK completed * BYE Q OK completed

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