September 2019 - dovecot

dsync having problems with @-sign in mailbox names
by Philip Iezzi 28 Sep '19

28 Sep '19

Hi there We are running Cyrus-to-Dovecot migrations using dsync on destination Dovecot server (Debian Stretch / latest Dovecot 2.3.7.2 from community repo) like this: $ doveadm -o mail_fsync=never backup -R -u <username> imapc: For imapc configuration to connect to remote Cyrus server, see below [1]. While this works great for hundreds of mailaccounts, dsync fails with the following error on accounts with @-sign in mailbox names: dsync(<username>): Error: Failed to access mailbox INBOX/entrance/admin@example: Invalid mailbox name I can confirm, Dovecot supports @-sign in mailbox names and no client (tested with Thunderbird, Apple Mail, Roundcube webmail) has issue with this character. Also Cyrus was always supporting this. So I guess this is an issue with dsync. Can we somehow tune charset (UTF-8 ?) in imapc configuration? Thanks, Philip [1] /etc/dovecot/conf.d/90-migration.conf: ## IMAP imapc_host = imap.example.com imapc_port = 993 imapc_ssl = imaps imapc_ssl_verify = yes imapc_user = %u imapc_master_user = cyrus imapc_password = ********** imapc_features = rfc822.size fetch-headers mail_prefetch_count = 20 imapc_list_prefix = INBOX ## POP3 pop3c_host = pop3.example.com pop3c_port = 995 pop3c_ssl = pop3s pop3c_ssl_verify = yes pop3c_user = %u pop3c_master_user = cyrus pop3c_password = ********** namespace { prefix = POP3-MIGRATION-NS/ location = pop3c: list = no hidden = yes } protocol doveadm { mail_plugins = $mail_plugins pop3_migration } plugin { pop3_migration_mailbox = POP3-MIGRATION-NS/INBOX }

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Mail received but not indexed?
by Marc Roos 28 Sep '19

28 Sep '19

I have recently that some users are complaining about that they are not getting emails. While I see that they are delivered and in the inbox. When I do a doveadm force-resync -u xxxx INBOX it resolves the problem. I think this is something recent. Where/how should I resolve this issue? Recent changes 1. did some os updates 2019-08-27 2. provider took away the ssd for index storage (maybe config issue having less iops storage?) CentOS Linux release 7.6.1810 (Core) dovecot-2.2.36-3.el7.x86_64 mail_location = mbox:~/mail:INBOX=/var/spool/mail/%u:CONTROL=~/mail/control:INDEX=/var/d ovecot2/%u/index:LAYOUT=maildir++ PS during force-resync, I am getting these "index/.INBOX/dovecot.index.log was locked for 176 seconds" on some users

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Debug one user possible?
by Marc Roos 27 Sep '19

27 Sep '19

Is it possible to mail debug just one user? Maybe via the userdb?

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limits in high-security mode with ssl
by sergio 27 Sep '19

27 Sep '19

Hello. I'm using dovecot in high-security mode: service_count = 1 for imap-login service starttls is requires, so the maximum number of active connections is process_limit (which is set to 1024) for the same imap-login service. But with this setup I got: doveconf: Warning: service auth { client_limit=1000 } is lower than required under max. load (1324) doveconf: Warning: service anvil { client_limit=1000 } is lower than required under max. load (1227) 1. Where did 1324 and 1227 come from? 2. How configuration should be updated so these warnings disappear? -- sergio.

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doveadm / vsize
by Paul Macdonald 27 Sep '19

27 Sep '19

Hi, i want to keep track of user mailbox size, I'm using doveadm mailbox status -u <user> vsize INBOX for a given mailbox this is under reporting ( by a lot) is this recursive? what shoud i be using to get an accurate disk usage metric? thanks Paul. -- ------------------------- Paul Macdonald IFDNRG Ltd Web and video hosting ------------------------- t: 0131 5548070 m: 07970339546 e: paul(a)ifdnrg.com w: http://www.ifdnrg.com ------------------------- IFDNRG 40 Maritime Street Edinburgh EH6 6SA ---------------------------------------------------- Virtual Servers from £50.00pm High specification Dedicated Servers from £150.00pm ----------------------------------------------------

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Re: Website Down? Not down.
by dundir＠gmail.com 27 Sep '19

27 Sep '19

Its not down, its most likely your providers DNS resolution. www.dovecot.org resolves to: ipv4 : 94.237.85.39 ipv6: 2a04:3542:1000:910:acc1:5bff:fe5e:3b83 Best Regards, D.

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Website down?
by ＠lbutlr 27 Sep '19

27 Sep '19

I am not able to reach the dovecot site on any one of three connections (home, office, mobile). Trying to look up DNS shows no records. -- But just because you've seen me on your TV Doesn't mean I'm any more enlightened than you

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File manager or browser for IMAP?
by Steve Litt 26 Sep '19

26 Sep '19

Hi all, I could really use a file manager or browser to browse my Dovecot IMAP. Ideally it would have hotkeys to move, copy, delete and send. The send part needn't be coded: Just a call to a shellscript which can handle the send the way it's locally the most convenient. Anyone know of such a file manager or browser for IMAP? SteveT Steve Litt Author: The Key to Everyday Excellence http://www.troubleshooters.com/key Twitter: http://www.twitter.com/stevelitt

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Typo in wiki
by Mika Pflüger 26 Sep '19

26 Sep '19

Hi, on https://wiki2.dovecot.org/Plugins/LastLogin the link to the new documentation page is wrong and leads to a 404. The correct link is https://doc.dovecot.org/plugin-settings/last-login-plugin/ . I tried correcting it myself in the wiki, but the Captcha was too hard for me. Cheers, Mika

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Dovecot UIDs and POP.
by Plutocrat 26 Sep '19

26 Sep '19

Hi, I recently performed a mail server migration for a client under fairly serious time constraints (ahem, yes one of those jobs). I would normally use imapsync to get all the mail copied to the new server, but under the circumstances, I had to write a script to rsync each of the mailboxes over ssh, from one server to another. This all worked fine, except for the fact that if a client was using a POP email client, when they connected to the new server, they re-downloaded all their mail, creating duplicates of everything in their Outlook client. Of course they weren't happy about this. IMAP email clients were OK. No duplicates, and everything was fine. So while I was migrating the mail, I did try for a while to understand the format of the UID files, but failed to do so in the available time, so the client just had to deal with duplicate emails. But now the smoke has cleared, I'd like to understand the problem a little better, and I was hoping someone on this forum could explain it to me, and the changes I'd need to make to the files so that the POP client DIDN'T download the duplicate emails. Here's what I understand. The list of dovecot files in an account looks like this: -rw-r----- 1 admin mail 0 Jul 11 2018 dovecot-acl-list -rw-r----- 1 admin mail 14K Sep 20 08:36 dovecot.index -rw-r----- 1 admin mail 216K Sep 20 17:24 dovecot.index.cache -rw-r----- 1 admin mail 29K Sep 20 17:24 dovecot.index.log -rw-r----- 1 admin mail 388 Dec 17 2017 dovecot.list.index -rw-r----- 1 admin mail 1.6K Jul 11 2018 dovecot.list.index.log -rw-r----- 1 admin mail 24 Jul 11 2018 dovecot.mailbox.log -rw-r----- 1 admin mail 53 Sep 12 09:42 dovecot-quota -rw-r----- 1 admin mail 52K Sep 20 17:24 dovecot-uidlist -rw-r----- 1 admin mail 8 Jul 11 2018 dovecot-uidvalidity -rw-r----- 1 admin mail 0 Jul 4 2016 dovecot-uidvalidity.5779bbeb It seems that the dovecot-uidlist is an index of all the mail files in the account. As far as I can gather, this should be the same on both servers after I've rsynced them over ssh: The files and the list of them in dovecot-uidlist should correspond. So what is it that the POP client looks at and decides to re-download all the emails? And how could I have stopped it from doing that, and get it to realize that the list of emails it holds internally is the same as the list on the server? What would I need to change in the dovecot files? Thanks for any insight into the process. As a secondary question -- and perhaps I should put this in a separate message -- I did notice that "doveadm sync" would apparently have helped me with this, but I wasn't able to get that to work either. I believe it was something to do with the fact that all the mailboxes were under the same linux user account on the target server, and I couldn't figure out all the paths and permissions in time. Would 'doveadm sync' have fixed all the UID and duplicate POP email issues? P.

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