April 2008 - dovecot - dovecot.org

[Dovecot] keep users from deleting email
by Adam Williams 17 Apr '08

17 Apr '08

I looked on the dovecot website, but didn't find an answer. With dovecot 1.0, is there a way to keep users from deleting their email? So that when they click the delete button on their email client, nothing happens/dovecot refuses to delete email, etc?

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[Dovecot] Dovecot 1.1rc3 "Out of Memory" crashes from pop3-login?
by richs＠whidbey.net 17 Apr '08

17 Apr '08

We recently began seeing server crashes in our cluster related to "pop3-login", which is causing "oom-killer" to be invoked. The server only recovers after a reboot. From dovecot.conf: login_process_per_connection = yes login_processes_count = 16 login_max_processes_count = 256 (Should we try switching processes_per_connection to no?) From dovecot.log: dovecot: Apr 17 07:48:39 Info: POP3(AAAAAAA): Disconnected: Logged out top=0/0, retr=0/0, del=0/154, size=10250932 dovecot: Apr 17 07:48:40 Info: POP3(BBBBBBB): Disconnected: Logged out top=0/0, retr=2/3729, del=2/2, size=3695 dovecot: Apr 17 07:48:40 Info: imap-login: Login: user=<CCCCCC>, method=PLAIN, rip=10.20.10.129 dovecot: Apr 17 07:48:41 Info: IMAP(CCCCCCC): Disconnected: Logged out bytes=551/7888 dovecot: Apr 17 07:49:06 Error: child 20678 (login) killed with signal 9 dovecot: Apr 17 07:49:12 Info: pop3-login: Login: user=<DDDDDDDD>, method=PLAIN, rip=66.165.6.233 dovecot: Apr 17 07:49:12 Info: pop3-login: Login: user=<EEEEEEEE>, method=PLAIN, rip=71.222.224.38 From /var/log/messages: Apr 17 07:48:42 mail2 kernel: pop3-login invoked oom-killer: gfp_mask=0xd0, order=0, oomkilladj=0 Apr 17 07:48:42 mail2 kernel: [<c0450ace>] out_of_memory+0x3b/0x179 Apr 17 07:48:42 mail2 kernel: [<c0451f01>] __alloc_pages+0x1fe/0x27e Apr 17 07:48:42 mail2 kernel: [<c05c6696>] tcp_sendmsg+0x4e7/0x994 Apr 17 07:48:42 mail2 kernel: [<c05dd85d>] inet_sendmsg+0x35/0x3f Apr 17 07:48:42 mail2 kernel: [<c059967c>] do_sock_write+0xa3/0xaa Apr 17 07:48:42 mail2 kernel: [<c059b653>] sock_writev+0x9b/0xb4 Apr 17 07:48:42 mail2 kernel: [<c04352a1>] autoremove_wake_function+0x0/0x2d Apr 17 07:48:50 mail2 kernel: [<c059bd76>] lock_sock+0x8e/0x96 Apr 17 07:48:50 mail2 kernel: [<c048bba9>] inotify_d_instantiate+0x3c/0x5f Apr 17 07:48:50 mail2 kernel: [<c05fb6bf>] _spin_lock_bh+0x8/0x18 Apr 17 07:48:50 mail2 kernel: [<c059bc63>] release_sock+0xc/0x91 Apr 17 07:48:50 mail2 kernel: [<c05fb6bf>] _spin_lock_bh+0x8/0x18 Apr 17 07:49:11 mail2 kernel: [<c059bd76>] lock_sock+0x8e/0x96 Apr 17 07:49:11 mail2 kernel: [<c04063f2>] do_IRQ+0xa5/0xae Apr 17 07:49:11 mail2 kernel: [<c040492e>] common_interrupt+0x1a/0x20 Apr 17 07:49:11 mail2 kernel: [<c059b5b8>] sock_writev+0x0/0xb4 Apr 17 07:49:11 mail2 kernel: [<c046986a>] do_readv_writev+0x166/0x277 Apr 17 07:49:11 mail2 kernel: [<c048d240>] ep_ptable_queue_proc+0x55/0x65 Apr 17 07:49:11 mail2 kernel: [<c05c5d6b>] tcp_poll+0x19/0x127 Apr 17 07:49:11 mail2 kernel: [<c0471673>] sys_fstat64+0x1e/0x23 Apr 17 07:49:11 mail2 kernel: [<c04699b2>] vfs_writev+0x37/0x43 Apr 17 07:49:11 mail2 kernel: [<c0469df6>] sys_writev+0x3c/0x96 Apr 17 07:49:11 mail2 kernel: [<c0403e95>] sysenter_past_esp+0x56/0x79 Apr 17 07:49:11 mail2 kernel: ======================= Apr 17 07:49:11 mail2 kernel: Mem-info: Apr 17 07:49:11 mail2 kernel: DMA per-cpu: Apr 17 07:49:11 mail2 kernel: cpu 0 hot: high 0, batch 1 used:0 Apr 17 07:49:11 mail2 kernel: cpu 0 cold: high 0, batch 1 used:0 Apr 17 07:49:11 mail2 kernel: cpu 1 hot: high 0, batch 1 used:0 Apr 17 07:49:11 mail2 kernel: cpu 1 cold: high 0, batch 1 used:0 Apr 17 07:49:11 mail2 kernel: DMA32 per-cpu: empty Apr 17 07:49:11 mail2 kernel: Normal per-cpu: Apr 17 07:49:11 mail2 kernel: cpu 0 hot: high 186, batch 31 used:27 Apr 17 07:49:11 mail2 kernel: cpu 0 cold: high 62, batch 15 used:51 Apr 17 07:49:11 mail2 kernel: cpu 1 hot: high 186, batch 31 used:30 Apr 17 07:49:11 mail2 kernel: cpu 1 cold: high 62, batch 15 used:58 Apr 17 07:49:11 mail2 kernel: HighMem per-cpu: Apr 17 07:49:11 mail2 kernel: cpu 0 hot: high 186, batch 31 used:129 Apr 17 07:49:11 mail2 kernel: cpu 0 cold: high 62, batch 15 used:6 Apr 17 07:49:11 mail2 kernel: cpu 1 hot: high 186, batch 31 used:124 Apr 17 07:49:11 mail2 kernel: cpu 1 cold: high 62, batch 15 used:10 Apr 17 07:49:11 mail2 kernel: Free pages: 2871096kB (2863824kB HighMem) Apr 17 07:49:11 mail2 kernel: Active:90263 inactive:9647 dirty:30 writeback:0 unstable:0 free:717774 slab:215197 mapped:2666 pagetables:1253 Apr 17 07:49:11 mail2 kernel: DMA free:3588kB min:68kB low:84kB high:100kB active:0kB inactive:0kB present:16384kB pages_scanned:0 all_unreclaimable? yes Apr 17 07:49:11 mail2 kernel: lowmem_reserve[]: 0 0 880 4848 Apr 17 07:49:11 mail2 kernel: DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no Apr 17 07:49:11 mail2 kernel: lowmem_reserve[]: 0 0 880 4848 Apr 17 07:49:11 mail2 kernel: Normal free:3684kB min:3756kB low:4692kB high:5632kB active:184kB inactive:20kB present:901120kB pages_scanned:361 all_unreclaimable? yes Apr 17 07:49:11 mail2 kernel: lowmem_reserve[]: 0 0 0 31744 Apr 17 07:49:11 mail2 kernel: HighMem free:2863824kB min:512kB low:4748kB high:8988kB active:360868kB inactive:38568kB present:4063232kB pages_scanned:0 all_unreclaimable? no -Rich

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[Dovecot] Dovecot and multiple instances in Geentoo
by Wojciech Matys 17 Apr '08

17 Apr '08

Is there any possiblity to run more than one instance of dovecot in gentoo (I was trying to run second instance but I don't know how to force it to use other pid file than /var/run/dovecot/master.pid) I'm using dovecot from portage dovecot-1.0.13-r1.

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[Dovecot] CRAM-MD5 Password Generation Algorithm
by Douglas Willcocks 17 Apr '08

17 Apr '08

Hi, I'm just in the middle of setting up dovecot to serve IMAPS -- Actually I've finished apart from one thing: CRAM-MD5 passwords. I'm using SQL as a backend for the password storage, and I don't want to store the passwords in plaintext. I've also configured dovecot to be rather restrictive when it comes to authentication methods (only CRAM-MD5 is allowed). To generate the passwords to go into the database I can use the dovecotpw utility, but I'm wanting to stick some sort of minimal admin interface on the server to be able to manage the users etc without having to use the CLI. I've looked at the theoretical explanation of the hashing algorithm, and I've read through the source code that dovecotpw uses to generate the passwords with the intent of creating a higher level language library (Perl, Ruby, PHP ... whatever)) to generate passwords, but I don't seem to be able to replicate the functionality, and there don't seem to be any existing libraries that generate consistent results (that I've found). I don't have that much experience with C, and so I'm sure that I must have misunderstood how dovecotpw does its stuff. Perhaps someone could explain how the algorithm works? Or point me in the right direction? Thanks, Douglas Willcocks

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[Dovecot] Dovecot-deliver lookup fails
by Wouter Amsterdam 17 Apr '08

17 Apr '08

Hi all, I'm still trying to get Dovecot-deliver to work in my config. I have found the problem to be in the maildir lookup for Dovecot-deliver as logged in /var/log/maillog: "Apr 15 16:30:34 termserv dovecot: auth(default): static(user(a)zesgoes.nl): passdb doesn't support lookups, can't verify user's existence" The thing I don't get, is that if I remove the virtual_transport modifications in /etc/postfix/master.cf and /etc/postfix/main.cf and the socket listen in /etc/dovecot.conf, all works well. So dovecot has no problems looking up my users on a LDAP server as a passdb backend, but failes when using the same passdb for dovecot-deliver. How come? TIA, Wouter

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[Dovecot] Multiple ssl certificates
by Wojciech Matys 17 Apr '08

17 Apr '08

Hello, I wonder if there is some possibility to force dovecot to use more than one ssl certificate. I would like to use a few certficates: one per IP We are hosting many different domains and I had to use stunnel to ensure encrypted connection for our clients using different certificates. But stunnel isn't a good solution and sometimes I need to restart stunnels because of some of it's processes hangs - after some improvements like setting ulimit it is better now but still it is not a permanent soulution. I would like to use is: 1.1.1.1 - certificate nr1 2.2.2.2 - certificate nr2 ..... Any suggestion?

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Re: [Dovecot] pop3 & imap
by tommy.s＠op.pl 17 Apr '08

17 Apr '08

> Ok, so I wonder how labels in gmail works :) one mail folder, you use lables to filter mails to be (not) seen by the mail client. Of course, one can virtualize folders by returning any message with a specific label in a virtual IMAP folder of that name. >>BTW: There was some talk about a virtual trashbin, "virtually" containing >>all messages marked as deleted in all folders. It's the same. >>Bye, >>- -- >>Steffen Kaiser Thanks for your answer,

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[Dovecot] pop3 & imap
by Tommy 17 Apr '08

17 Apr '08

Hi, I use dovecot as pop3 and imap(squirrelmail) server. When I create a folder through webmail and set some sieve rules(fileinto for example), messages will be delivered to that folder by lda, but will not be visibe for pop clients. Is it possible to download these messages ? (Dovecot 1.0, debian etch) regards

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[Dovecot] postfix virtual maildir
by Gert Cuykens 17 Apr '08

17 Apr '08

my postfix setup http://code.google.com/p/appwsgi/wiki/smtp my dovecot setup http://code.google.com/p/appwsgi/wiki/imap root@localhost:~# /etc/postfix/test/root 220 localhost.localdomain ESMTP Postfix (Ubuntu) 250-localhost.localdomain 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH PLAIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN 235 2.7.0 Authentication successful 250 2.1.0 Ok 250 2.1.5 Ok 354 End data with <CR><LF>.<CR><LF> 250 2.0.0 Ok: queued as E19B649016D 221 2.0.0 Bye root@localhost:~# /etc/dovecot/test/root * OK Dovecot ready. . OK Logged in. . LIST "" "*" Apr 9 13:01:58 localhost postfix/smtpd[9345]: connect from localhost[127.0.0.1] Apr 9 13:01:58 localhost dovecot: auth-worker(default): mysql: Connected to 127.0.0.1 (mail) Apr 9 13:01:58 localhost postfix/smtpd[9345]: E19B649016D: client=localhost[127.0.0.1], sasl_method=PLAIN, sasl_username=root@vlocalhost Apr 9 13:01:58 localhost postfix/cleanup[9349]: E19B649016D: message-id=<20080409110158.E19B649016D(a)localhost.localdomain> Apr 9 13:01:58 localhost postfix/qmgr[11316]: E19B649016D: from=<root@vlocalhost>, size=359, nrcpt=1 (queue active) Apr 9 13:01:58 localhost postfix/smtpd[9345]: disconnect from localhost[127.0.0.1] Apr 9 13:01:58 localhost postfix/virtual[9350]: E19B649016D: to=<root@vlocalhost>, relay=virtual, delay=0.03, delays=0.02/0.01/0/0.01, dsn=2.0.0, status=sent Apr 9 13:01:58 localhost postfix/qmgr[11316]: E19B649016D: removed Apr 9 13:02:24 localhost dovecot: imap-login: Login: user=<root@vlocalhost>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured Apr 9 13:12:19 localhost postfix/qmgr[11316]: BD567490191: from=<root@vlocalhost>, size=359, nrcpt=1 (queue active) Apr 9 13:12:19 localhost postfix/virtual[18607]: BD567490191: to=<root@vlocalhost>, relay=virtual, delay=7037, delays=7037/0.01/0/0.01, dsn=2.0.0, status=sen Apr 9 13:12:19 localhost postfix/qmgr[11316]: BD567490191: removed Apr 9 13:18:51 localhost dovecot: IMAP(root@vlocalhost): Connection closed So no erros at all but dovecot just ignores my incoming mail root@localhost:~# ls -al /var/mail/vlocalhost/root/ total 20 drwx------ 5 5001 5001 4096 2008-04-09 12:19 . drwx------ 3 5001 5001 4096 2008-04-09 12:19 .. drwx------ 2 5001 5001 4096 2008-04-09 12:19 cur drwx------ 2 5001 5001 4096 2008-04-09 13:22 new drwx------ 2 5001 5001 4096 2008-04-09 13:22 tmp root@localhost:~# ls -al /var/mail/vlocalhost/root/new total 84 drwx------ 2 5001 5001 4096 2008-04-09 13:22 . drwx------ 5 5001 5001 4096 2008-04-09 12:19 .. -rw------- 1 5001 5001 441 2008-04-09 12:19 1207736352.V802I42434dM422151.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:22 1207736539.V802I424350M438766.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:22 1207736539.V802I424351M442839.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:27 1207736839.V802I424352M458479.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:32 1207737139.V802I424353M475024.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:32 1207737139.V802I424354M479117.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:32 1207737139.V802I424355M484827.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:32 1207737139.V802I424356M488137.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:32 1207737139.V802I424357M495435.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:37 1207737439.V802I424472M506944.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:37 1207737439.V802I424473M511500.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:37 1207737439.V802I424474M516792.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:37 1207737439.V802I424475M518515.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:42 1207737739.V802I424476M535074.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:47 1207738039.V802I424477M550421.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 12:52 1207738339.V802I424478M566532.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 13:01 1207738918.V802I424479M942873.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 13:12 1207739539.V802I42447aM958350.localhost.localdomain -rw------- 1 5001 5001 441 2008-04-09 13:22 1207740139.V802I42447bM974462.localhost.localdomain root@localhost:~# So what can i do to see some listing of my new mail ?

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[Dovecot] how to link antispam server & mail server?
by Allen Sim 17 Apr '08

17 Apr '08

Hi; I just installed antispam server & quarantine system in a machine, and mail server in another machine. I tested the mail server, it works ok! can send in & out the mail properly.. how can i link my mail server and antispam togather? Please advice ThankYou Regards Allen

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