- dovecot - dovecot.org

[Dovecot] Embedded "From<space>" Lines
by Lennart Lövstrand 29 Oct '08

29 Oct '08

Hi. As some of you may remember, I reported a problem a while back where dovecot 1.1.beta14 (as well as dovecot 1.0) would corrupt mbox-style mailboxes by ignoring the Content-Length header and breaking up messages with embededed "From<space>" lines. I recently downloaded Dovecot 1.1.5 and noted to my pleasure that this bug now has been fixed. That's great! This fix envolves checking to see if the expected_body_size (from the Content-Length header) is larger than the body_size produced by the "From<space>" scanner, and if so, if there is a valid "From<space>" line at the "expected" end of the message. However, I also noted that there's a case which the fix doesn't cover, and that's where the "From<space>" line appears as the first line of the body of the message. When this happens, the body_offset will point to the blank line between the headers and the body and not the actual first line of the body. This will cause the stream to be mispositioned at the time of the "From<space>" verification check in istream_raw_mbox_get_body_size and the (actually correct) expected_body_size will be rejected. I have enclosed a simple diff that will work around this by adjusting the body_offset to point to the next line at the time of call to istream_raw_mbox_is_valid_from in istream_raw_mbox_get_body_size. This appears to handle the problem correctly in all the test cases I have. To anyone else who has run into this problem and gotten corrupted mailboxes as a result, I can also offer an mbox checker that will attempt to detect and repair this problem in existing mailboxes as well as inspect them for other problems. I'm not ready to send it out for a full release yet, but interested beta testers are invited to contact me directly. Cheers, --Lennart

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[Dovecot] quota warning not working
by Claudio Prono 29 Oct '08

29 Oct '08

Hi all, I have finally get working the quota with dovecot. Now i am setting up the quota warning, with this in dovecot.conf: quota_warning = storage=70%% /usr/bin/quota_warning.sh 70 In the plugin section naturally. All seems to work fine, the quota is calculated right, but seems the script is not executed... In dovecot logs i have this: deliver(test(a)test.com): Oct 27 15:14:53 Info: Quota warning: bytes=10752000 (70%) messages=0 (0%) command=/usr/bin/quota_warning.sh 70 But...nothing happens. My quota_warning.sh is this: #!/bin/bash PERCENT=$1 echo "/usr/lib/dovecot/deliver -d "$USER" -c /usr/local/etc/dovecot-nowarning.conf" > /var/log/quotanotify cat << EOF | /usr/lib/dovecot/deliver -d "$USER" -c /usr/local/etc/dovecot-nowarning.conf From: postmaster(a)mediaservice.net Subject: quota warning Your mailbox is now $PERCENT% full. EOF I have added the echo for debug pourpose, but no file was created, so the script is not executed. I thinked is a permission problem, but seems not. Now the script is like this: -rwx--x--x 1 dovecot dovecot 317 Oct 27 15:30 /usr/bin/quota_warning.sh What can be the problem? Stuck!!! Claudio. -- ------------ Claudio Prono Systems Development @ Atpss.net Srl, Divisione Implementazione Sistemi Via San Bernardino, 17 - 10137 Torino (TO) - IT Tel +39-011.32.72.100 Fax +39-011.32.46.497 PGP Fingerprint: 75C2 4049 E23D 2FBF A65F 40DB EA5C 11AC C2B0 3647 Disclaimer: http://atpss.net/disclaimer ------------

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[Dovecot] Dovecot pop3 and SonicWall?
by Brandon Lamb 29 Oct '08

29 Oct '08

Hello Has anyone else run into a problem with dovecot pop3 and sonicwall? A week after switching to dovecot we had two local customers call and report they could no longer download emails with attachments. It turned out to be the email macro filter on the router. After the first report I thought maybe the customer had just changed something or it was a fluke, but then a day later we had the second call with the same issue. For some reason, after us switching the sonicwall's email macro filter was catching any attachments as a threat. I couldnt see how changing pop3 servers could affect that, but I guess anything is possible. I just emailed sonicwall and am waiting for a response from them now as well. Hopefully maybe someone has heard of this before. Unfortunately, I dont know if this was pure coincidence, or if both customers happened to have updated their sonicwall software, or maybe it autoupdates, I have no information on it.Of course to them it looks like we broke it. We just had them both turn this rule off for now.

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[Dovecot] Panic: pop3-login: file sasl-server.c: line 75 (authenticate_callback): assertion failed: (client->auth_request == request)
by Mike Abbott 29 Oct '08

29 Oct '08

Running Dovecot-1.1.5, I see this assertion failure: Panic: pop3-login: file sasl-server.c: line 75 (authenticate_callback): assertion failed: (client->auth_request == request) Error: pop3-login: Raw backtrace: 2 pop3-login 0x000000010000ac41 default_fatal_finish + 41 -> 3 pop3-login 0x000000010000acac i_syslog_fatal_handler + 0 -> 4 pop3-login 0x000000010000a446 i_info + 0 -> 5 pop3-login 0x00000001000053a2 authenticate_callback + 126 -> 6 pop3-login 0x000000010000841c auth_client_input_fail + 280 -> 7 pop3-login 0x0000000100007910 auth_client_input + 358 -> 8 pop3-login 0x000000010000e074 io_loop_handler_run + 272 -> 9 pop3-login 0x000000010000d449 io_loop_run + 38 -> 10 pop3-login 0x0000000100004864 main + 1572 -> 11 pop3-login 0x00000001000012fc start + 52 Error: child 1302 (login) killed with signal 6 This happens when I feed multiple user/pass lines to Dovecot all at once like this: $ telnet gromit 110 Connected. Escape character is '^]'. +OK Dovecot ready. user x pass y user x pass y +OK +OK Connection closed by foreign host. The four user/pass lines I pasted in all at once. IMAP login does not crash when presented with multiple login commands, but it does not read them all at once and needs prodding (in the form of extra command lines sent later on) to read them. Actually it appears to read the first two lines then stops reading until more data comes in: $ telnet gromit 143 Connected. Escape character is '^]'. * OK Dovecot ready. a login a b b login c d c login e f d login g h e login i j a NO Authentication failed. b NO Authentication failed. c NO Authentication failed. d NO Authentication failed. e NO Authentication failed. * BAD Error in IMAP command received by server. * BAD Error in IMAP command received by server. * BAD Error in IMAP command received by server. * BAD Error in IMAP command received by server. ^] telnet> q Connection closed. You probably don't care about the odd imap-login behavior, but I tried it and mentioned it just for completeness after seeing pop3-login crash.

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[Dovecot] Best configuration of dovecot for limit Outlook problems with IMAP
by Alessio Cecchi 29 Oct '08

29 Oct '08

Hi, in some installation where users using IMAP and Outlook Express I have some problems. Outolook randomly presents problems in messages retrieving, for example: "Outlook Express is unable to retrieve the requested message because the server no longer has the message available.... server response: Fecth Completed" or "Message could not be displayed" error message when I try to view an Outlook Express e-mail message I'm using dovecot 1.1.4 with qmail and vpopmail. This is my dovecot configure options: ./configure --prefix=/usr --sysconfdir=/etc/dovecot --localstatedir=/var --with-ssldir=/etc/ssl and this my dovecot config: # dovecot -n # 1.1.4: /etc/dovecot/dovecot.conf log_path: /var/log/dovecot/dovecot-err.log info_log_path: /var/log/dovecot/dovecot.log ssl_cert_file: /etc/apache2/ssl/comun.crt ssl_key_file: /etc/apache2/ssl/comun.key disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/libexec/dovecot/imap-login login_greeting: Ready login_process_per_connection: no first_valid_uid: 89 last_valid_uid: 89 first_valid_gid: 89 last_valid_gid: 89 mail_uid: 89 mail_gid: 89 mail_location: maildir:~/Maildir mail_debug: yes mail_plugins: quota imap_quota imap_client_workarounds: outlook-idle delay-newmail namespace: type: private separator: . prefix: INBOX. inbox: yes list: yes subscriptions: yes auth default: verbose: yes debug: yes passdb: driver: checkpassword args: /home/vpopmail/bin/vchkpw userdb: driver: prefetch args: uid=89 gid=89 home=/home/vpopmail/domains/%d/%u plugin: quota: maildir What further changes to the configuration of dovecot could I do? Do you have other suggestions? Thanks -- Alessio Cecchi is: @ ILS -> http://www.linux.it/~alessice/ Assistenza Sistemi GNU/Linux -> http://www.cecchi.biz/ @ PLUG -> ex-Presidente, adesso senatore a vita, http://www.prato.linux.it @ LOLUG -> neo-Socio http://www.lolug.net

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[Dovecot] Dovecot and quota enforcement - only reporting?
by dovecot＠corwyn.net 29 Oct '08

29 Oct '08

I'm currently setting up postfix and dovecot with virtual users (mysql), imap, and quotas. I'm setting the quotas using mysql. I have quotas working correctly, and I can telnet into the imap server, and submit . getquotaroot inbox and get back valid quota information. I get a maildirsize file in the Maildir directory. Very cool. When I delete mail and expunge it, the quota updates. However, inbound email doesn't appear to update the quota. Two questions, probably related: What causes the quota (which I presume is the maildirsize file) to update? Is there any actual quota enforcement, or just reporting? Because if I send mail to an account, even if it currently reporting (via maildirsize or . getquotaroot) that the user is over quota, they still can send and receive email. Thanks! Rick Rick Steeves http://www.sinister.net "The journey is the destination"

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[Dovecot] mail_location: mbox: mkdir failed
by Albert E. Whale 29 Oct '08

29 Oct '08

Is there an automatic solution to this? Oct 27 08:00:48 192.168.50.5 dovecot: POP3(evelina2): mail_location: mbox: mkdir(/home/popuser_evelina2/mail) failed: Permission denied Oct 27 08:00:48 192.168.50.5 dovecot: Fatal: POP3(evelina2): Namespace initialization failed Oct 27 08:00:51 192.168.50.5 dovecot: POP3(evelina2): mail_location: mbox: mkdir(/home/popuser_evelina2/mail) failed: Permission denied Oct 27 08:00:51 192.168.50.5 dovecot: Fatal: POP3(evelina2): Namespace initialization failed -- Albert E. Whale, CHS CISA CISSP Sr. Security, Network, Risk Assessment and Systems Consultant ------------------------------------------------------------------------ ABS Computer Technology, Inc. <http://www.ABS-CompTech.com> - Email, Internet and Security Consultants SPAMZapper <http://www.Spam-Zapper.com> - No-JunkMail.com <http://www.No-JunkMail.com> - *True Spam Elimination*.

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[Dovecot] Authentication Error Message formats
by Albert E. Whale 29 Oct '08

29 Oct '08

I have been using UW's IMAP server and I am converting to Dovecot for Maildir support. When a user fails authentication, or a user does not exist, it appears that the same message is used for these events. Is there a way to indicate that the user does not exist (Invalid user), and authentication Failure (Failed Password)? Clearly these two failures indicate a different error in the system. One that some forgot their password, the other indicates a dictionary attack. -- Albert E. Whale, CHS CISA CISSP Sr. Security, Network, Risk Assessment and Systems Consultant ------------------------------------------------------------------------ ABS Computer Technology, Inc. <http://www.ABS-CompTech.com> - Email, Internet and Security Consultants SPAMZapper <http://www.Spam-Zapper.com> - No-JunkMail.com <http://www.No-JunkMail.com> - *True Spam Elimination*.

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[Dovecot] Empty/corrupt mail leads to duplicate delivery
by Marc Herbrechter 29 Oct '08

29 Oct '08

Hi, when the attached mail was stored in a maildir, fetching mail via POP3 lead to multiple delivery of mails in that maildir to the client (Outlook). I replaced the domain with dots. This is the dovecot configuration: --snip-- protocols = imap imaps pop3 pop3s listen = * disable_plaintext_auth = no ssl_cert_file = /etc/ssl/dovecot/server.pem ssl_key_file = /etc/ssl/dovecot/server.key mail_location = maildir:~/.maildir protocol pop3 { pop3_uidl_format = %08Xu%08Xv } auth default { mechanisms = plain passdb pam { args = "*" } userdb passwd { } user = root socket listen { client { path = /var/spool/postfix/private/auth mode = 0660 user = postfix group = postfix } } } --snip-- Version: dovecot-1.1.4-r1 (Gentoo) Gentoo applies the attached "expire" patch. I tried to reproduce the behavior, but when I send an empty mail via telnet, nothing happens. The box is running Amavis, don't know if that helps. -- Mit freundlichen Grüßen, with kind regards, Marc Herbrechter <mh(a)zebroc.de>

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[Dovecot] Keep the email on the server
by Rubens A. Mascari 29 Oct '08

29 Oct '08

Hello, I migrate my server POP3/IMAP recently the Courier-IMAP for Dovecot and am having problems when the user configures your e-mail client to leave a copy of mail on the server. All mail in the inbox, are brought all the time that you check your mailbox input via POP3, causing a large traffic of unnecessary data every time. In my opinion you should bring only the new mail, unread. Can you tell me if this is a configuration issue on Dovecot? Thank you all -- Att. Rubens Aurelio Mascari ..................................... _ Linux & Internet Developer .... ICQ# 2730907 ............... °v° Odara Internet LTDA............ (44) 3226-3662 ............. /(_)\ Maringá - Paraná .............. http://www.odara.com.br .... ^ ^ ______.-""-.__ QuEm TeM o CoNhEcImEnTo TeM o PoDeR __.-""-._______

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