August 2014 - dovecot

Test / can you see my mail??
by Michael Ludwig 12 Aug '14

12 Aug '14

Hi! I have to excuse my behave and I am really sorry. Yesterday I wrote two mails to this list and they never showed up in the online archives where I checked it. So that's the reason for this testmail. I hope this mail is readable to all of you? Cheers, Michael

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Defer email via LMTP when there is 'no space left on device' instead of rejecting it
by Christian Rohmann 12 Aug '14

12 Aug '14

Hello dovecot-users, (This problem was being discussed a little in this thread from 2011: http://www.dovecot.org/list/dovecot/2011-May/059009.html) I noticed (using LMTP) that Dovecot handles 'no space left on device' just like an 'over-quota', if I read this part of method "static int client_deliver(struct client *client, const struct mail_recipient *rcpt, struct mail *src_mail, struct mail_deliver_session *session)" "lmtp/commands.c" correctly: --- cut --- [...] else if (storage != NULL) { error = mail_storage_get_last_error(storage, &mail_error); if (mail_error == MAIL_ERROR_NOSPACE) { client_send_line(client, "%s <%s> %s", dctx.set->quota_full_tempfail ? "452 4.2.2" : "552 5.2.2", rcpt->address, error); } else { client_send_line(client, "451 4.2.0 <%s> %s", rcpt->address, error); } ret = -1; [...] --- /cut --- In consequence this means the configuration option quota_full_tempfail is applied in both cases. But to me there is a major difference between a full disk (a.k.a "admin fucked up") and over-quota (a.k.a. "user has simply too much stuff in his mailbox"). So I would like to be able tell Dovecot to reject messages due to full mailboxes, but simply defer those that cannot be stored due to a full disk (which I am to blame for). To me this should result in two separate configuration options for the two problem root-causes: quota_full_tempfail storage_full_tempfail Or did I simply miss or completely misunderstood anything here? Regards Christian

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doveadm pw with SHA512-CRYPT won't roundtrip
by Jon Hulatt 12 Aug '14

12 Aug '14

Hi, Not sure if this is a PBKAC or not:- root@ds3:/usr/share/postfixadmin# doveadm pw -s SHA512-CRYPT -p password {SHA512-CRYPT}$6$aUgGXP0UshkMj7hY$9JV4yMRsjIe/98CzmglYrMjf.9NJ.FXzxcLE9B0v3doCRUWo2wRncc6hg6VCs0DCUHQbeC/bRDZdGCge/nB/h/ root@ds3:/usr/share/postfixadmin# doveadm pw -t {SHA512-CRYPT}$6$aUgGXP0UshkMj7hY$9JV4yMRsjIe/98CzmglYrMjf.9NJ.FXzxcLE9B0v3doCRUWo2wRncc6hg6VCs0DCUHQbeC/bRDZdGCge/nB/h/ -p password doveadm(root): Fatal: reverse password verification check failed: Password mismatch root@ds3:/usr/share/postfixadmin# dovecot --version 2.2.9 It works ok with other schemes that i’ve tried (e.g. SSHA-512). Is this a bug, or my mistake? thanks Jon

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Frequent error: unknown namespace Trash
by Michael Ludwig 12 Aug '14

12 Aug '14

Hello to all of you! ;-) My first post on this list. I frequently get this error in dovecot.log every time a user logs in and out: ============================= imap(mailaddress): Error: quota: Unknown namespace: Trash ============================= When I change my conf.d/90-quota.conf from "Trash" to ".Trash" (as this is the imap/maildir folder name, the error stays the same, but with the ".Trash" in dovecot.log This is what my 90-quoato.conf looks like: ============================= plugin { quota_rule = *:storage=2G quota_rule2 = Trash:storage=+100M quota_grace = 10%% } ============================= Where can I start my search, what is going wrong? Just for letting you know: This mailserver is a fresh and clean setup. I am using postfix/dovecotvimbadmin/mysql/spamassassin/clamsmtp. Cheers, Michael

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Sieve: Saving "pristine" messages for backups and spam training
by Jeff Rice 12 Aug '14

12 Aug '14

Hello, I'm trying to work out a way to have my Sieve filter save a "pristine" version of email messages as a backup, primarily to use for training the spam filter. I would like is to have every message saved into a single, site-wide directory (in the global sieve) before being processed additionally and delivered. The messages in that directory will be used to train the spam filter without having to worry about removing Spamassassin headers and so forth. I thought fileinto :copy might do what I wanted, but this creates a backup directory individually for each user. That's unmanageable for the spam training process I use. redirect *could* work, but that adds a header during the process so the email saved would not be "pristine". I'm thinking of using the extprograms plugin to pipe to a program that will do a simple copy. That feels very hackish, however, and I'm hoping there is a more elegant solution. Am I missing something obvious here? Thanks! Jeff

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Re: Throttling pop3-login connections
by Joseph Tam 12 Aug '14

12 Aug '14

Alex <mysqlstudent(a)gmail.com> writes: > Okay, that makes sense, and is in line with what I was also thinking. This > is like 30 concurrent requests, then nothing for a minute or two, then > another 30 concurrent requests. 30 concurrent requests at 1 or 2 minute intervals? This seems weird, as I would expect it to be more or less randomly distributed over that interval. Does this happen at the top of each minute? If what you observe is true, the only situation I can think of that would cause this is a bunch of POP3 fetch clients running as a cron job synchronized to a minute grid (i.e seconds=0). Joseph Tam <jtam.home(a)gmail.com>

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Options mail_nfs_storage and mail_nfs_index not in 2.2(.13) example config anymore?
by Christian Rohmann 11 Aug '14

11 Aug '14

Hey dovecot-users, did I miss anything anywhere about the configuration variables "nfs_storage" and "mail_nfs_index" being removed from the example configuration in 2.2? In 2.1 they where both in 10-mail.conf commented out and set to their default "no". But with 2.2 they are not in any of the exmaple config files anymore. doveadm is still showing the variables and they can be used as ever still. Just wondering if I missed something and this should be configured differently on 2.2 now. Regards Christian

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poolmon improvements
by Timo Sirainen 11 Aug '14

11 Aug '14

I've been planning to improve poolmon failure checking for a long time already, but I still haven't managed to get to it. Maybe somebody else has more time, so here's a feature request for anyone to implement: poolmon currently gives up immediately if the first check to any service fails. It really should be trying multiple times over multiple seconds before giving up. I think ideally it would be: - Individual check timeout could still be the default 5 seconds - Add full check time setting, which could be e.g. 15 seconds. If all checks fail during this time then disable the host. - If request fails because connection gets rejected, retry quickly, e.g. after 0,1 seconds - If check fails because of protocol errors, wait for a long time, e.g. 1 second So this would avoid backend being removed in situations where it really shouldn't be removed: - Dovecot restarts - Dovecot reloads - load spikes and other random issues that cause temporary problems Especially the load spike is an annoying issue which my plan doesn't even fully solve. The solution to fix a heavily overloaded cluster isn't really to start removing all of its backends that are busy working..

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Frequent error: unknown namespace Trash
by Michael Ludwig 11 Aug '14

11 Aug '14

Hello to all of you! ;-) My first post on this list. I frequently get this error in dovecot.log every time a user logs in and out: ============================= imap(mailaddress): Error: quota: Unknown namespace: Trash ============================= When I change my conf.d/90-quota.conf from "Trash" to ".Trash" (as this is the imap/maildir folder name, the error stays the same, but with the ".Trash" in dovecot.log This is what my 90-quoato.conf looks like: ============================= plugin { quota_rule = *:storage=2G quota_rule2 = Trash:storage=+100M quota_grace = 10%% } ============================= Where can I start my search, what is going wrong? Just for letting you know: This mailserver is a fresh and clean setup. I am using postfix/dovecotvimbadmin/mysql/spamassassin/clamsmtp. Cheers, Michael

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postfix-dovecot Auth USER lookup failed
by Timothy Murphy 10 Aug '14

10 Aug '14

I'm running postfix + dovecot on my CentOS-7 home server. When I send myself a message I get this error message in /var/log/maillog: Aug 9 12:59:57 alfred postfix/lmtp[31336]: B0D02220748: to=<tim(a)localhost.gayleard.eu>, orig_to=<tim@localhost>, relay=alfred.gayleard.eu[private/dovecot-lmtp], delay=475, delays=474/0.03/0.02/0.09, dsn=4.3.0, status=deferred (host alfred.gayleard.eu[private/dovecot-lmtp] said: 451 4.3.0 <tim(a)localhost.gayleard.eu> Internal error occurred. Refer to server log for more information. (in reply to RCPT TO command)) and in /var/log/dovecot I read Aug 09 13:13:03 auth-worker(31472): Error: passwd(tim(a)localhost.gayleard.eu): getpwnam() failed: Address family not supported by protocol Aug 09 13:13:03 lmtp(31470): Error: user tim(a)localhost.gayleard.eu: Auth USER lookup failed It seems that USER is set to tim(a)localhost.gayleard.eu rather than tim . I am including the line mailbox_transport = lmtp:unix:private/dovecot-lmtp in /etc/postfix/main.cf . If I omit this line so that postfix sends email directly to ~/Maildir I have no problem - except that spam is not being filtered. I give the output of postconf -n below. Any advice or enlightenment gratefully received. Output of postconf -n ---------------------- [tim@alfred ~]$ cat /tmp/postconf alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5 home_mailbox = Maildir/ html_directory = no inet_interfaces = all inet_protocols = all mail_owner = postfix mailbox_transport = lmtp:unix:private/dovecot-lmtp mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = gayleard.eu myhostname = alfred.gayleard.eu mynetworks = 192.168.0.0/24, 127.0.0.0/8 myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relay_domains = relayhost = out.alice.it sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/password smtp_sasl_security_options = smtpd_milters = unix:/var/run/spamass-milter/postfix/sock unknown_local_recipient_reject_code = 550 ---------------------- -- Timothy Murphy e-mail: gayleard /at/ eircom.net School of Mathematics, Trinity College, Dublin 2, Ireland

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