- dovecot - dovecot.org

question about using cram-md5 login passwords
by Fabian A. Santiago 23 Apr '18

23 Apr '18

hello dovecot community, question; if my user database and dovecot installation is currently setup to use plain login passwords, and i want to convert to cram-md5, after i configure dovecot accordingly and reset passwords into cram-md5, if anyone uses plain login method again in the future, will it still work? or must they always from this point on use encrypted passwords? Thanks. -- Thanks, Fabian S. OpenPGP: 0x643082042DC83E6D94B86C405E3DAA18A1C22D8F (new key) 0x3C3FA072ACCB7AC5DB0F723455502B0EEB9070FC (to be retired / revoked)

2 2

lost connection while sending end of data error
by Christos Chatzaras 23 Apr '18

23 Apr '18

I use dovecot-lmtp and postfix. When I send e-mail to 2 recipients (or more) at the same time and if one of them is over quota (or under quota and the message I send is bigger than his free space) mailq shows: -Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient------- 20B03336F22 26099 Thu Apr 19 18:02:47 support(a)example.com (lost connection with server25.example.org[private/dovecot-lmtp] while sending end of data -- message may be sent more than once) user1(a)example.com user2(a)example.com E-mails sent from the same domain on same server so it's a local delivery. If I send the e-mail to the over quota user ( only him on To: ) then I get a bounce that says that user is over quota which is the correct behaviour. I think the problem started after I upgrade dovecot-2.2.35 to dovecot-2.3.1. Is this a known bug?

2 3

Merging mailboxes with doveadm
by Carsten Schmitz 23 Apr '18

23 Apr '18

Hello, I am trying to merge(=copy) all mails of all user mailboxes into one mailbox for one-time archival purposes. The command I am using is sudo doveadm -v copy -A archive(a)somedomain.net ALL The error I get for every mailbox is: doveadm(someuser1(a)somedomain.net): Error: Can't open mailbox 'a(a)somedomain.net': Mailbox doesn't exist: archive(a)somedomain.net doveadm(someuser2(a)somedomain.net): Error: Can't open mailbox 'a(a)somedomain.net': Mailbox doesn't exist: archive(a)somedomain.net [etc...] I don't exactly understand why. I think I am don't understand the 'destination' parameter correctly, so somebody can enlighten me, please? Thank you Carsten

2 1

2.3.1 -> "doveadm backup -A" not working
by spamvoll＠googlemail.com 21 Apr '18

21 Apr '18

Hi, I'm running 2.3.1 and trying to do a backup. Wiki and manpage showes that -A will backup all mailboxes. It seems that "doveadm -Dv backup -A mdbox:/mnt/BACKUP/DOVECOT/" is saving each mailbox to " /mnt/BACKUP/DOVECOT/" but after finishing one, its overwriting the data from the previous user. So it ends with only the mails from the last user processed. I tried %u but thats not recognized and used as String in the path. Hans

1 0

RE: Re: Filesystem level backups?
by DurgaPrasad - DatasoftComnet 20 Apr '18

20 Apr '18

Hello all, Does doveadm backup - backup the attachments as well when using SIS ? Regards Durga Prasad +919849111010 -----Original Message----- From: dovecot [mailto:dovecot-bounces@dovecot.org] On Behalf Of Marc Stürmer Sent: 09 April 2018 18:05 To: Steve Atkins Cc: dovecot(a)dovecot.org Subject: {Spam?} Re: Filesystem level backups? Am 2018-04-09 00:55, schrieb Steve Atkins: > Will a simple backup of all the files of an multi-dbox give me a > consistent state when I recover, or do I need to do something (e.g. > lock writes to the mailbox) while I run a backup? If you are doing this backup with a fully operational mail storage: no, it won't. The reason is quite simple: mdbox saves the data of an email in several files, so there's a good chance that those files might slightly change during backup, while with Maildir all necessary data for the restore is stored in the file names. If you want to do a consistent backup, you do need file system snapshots and should make sure that this snapshot is consistent or to turn off the mail store during backup completely. But just doing rsync on the fly as with Maildir is just begging on your side to run into problems sooner or later... -- Greetings, Marc --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

3 4

massive mail move
by David Mehler 20 Apr '18

20 Apr '18

Hello, I've got dovecot 2.3 going and a mailbox with a lot of system messages in it. What I'm wanting to do is massively move them to another mailbox. Is this doable with sieve? Thanks. Dave.

2 2

maildir vs dbox?
by David Mehler 20 Apr '18

20 Apr '18

Hello, I've got a Dovecot virtual email setup using maildir as the mailbox format. I am wondering from others who have chosen dbox a comparison between maildir and dbox or those who have migrated from one format to another. I am wondering if changing to dbox would be beneficial? Thanks. Dave.

4 3

Replication between servers with different mail_home path
by Arie Peterson 20 Apr '18

20 Apr '18

Hi, I have two dovecot servers that are configured to be replicated using dsync over ssh. This has been working well for a long time. Recently I changed the mail_home path on one of the servers, because of mail data migration. The old file system is still available, but has been made read-only for now – I plan to remove it once everything runs smoothly again. Now it seems replication is failing: the mail.err log file on both servers has lots of error messages saying that it tried to open a file on the old location and failed because it is read-only. Is this setup, with different mail_home paths on the two servers being replicated, even supported? If so, do I need to specify this explicitly in the configuration? I couldn't find relevant settings in the documentation.

1 0

Comparing Indexing Speed + ZFS question
by Qmail 18 Apr '18

18 Apr '18

Hi, have two quick questions: I am re-indexing some large mailboxes and I wanted to get some opinions on these speeds. I ran a random sort command on an unindexed mailbox in order to get it to index. Results, for a mailbox with 10GB Inbox, spread in 65 000 files: 3 UID SORT (ARRIVAL) US-ASCII OR OR OR FROM "dfgfgfgf" SUBJECT "dfgfgfgf" TO "dfgfgfgf" CC "dfgfgfgf" a03 select INBOX * SORT 3 OK Sort completed (2455.549 + 0.122 + 1.477 secs). Index cache file at the end was 31MB in size: 30756376 Apr 18 02:14 dovecot.index.cache Is that normal, slow or fast ? Second question is, how can I speed this up ? I store messages using Director over NFS , on top of ZFS. From what I've read it would be fairly safe to disable mail_fsync but I don't think that would help much with the indexing speed. Any other tips ?

2 2

Postfix sendmail cannot be called from Sieve redirect
by Ulrich Zehl 18 Apr '18

18 Apr '18

Sending (in my case: forwarding) messages from Sieve via sendmail does not work with version 2.3.1. I have narrowed it down to this simple test case: # dovecot -n # 2.3.1 (c5a5c0c82): /etc/dovecot/dovecot.conf # OS: Linux 4.4.0-119-generic x86_64 Ubuntu 16.04.4 LTS # Hostname: tuxi.topfen.net first_valid_gid = 200 first_valid_uid = 200 mail_location = mbox:~/mail passdb { args = password=secret driver = static } plugin { sieve = file:~/sieve;active=~/.dovecot.sieve } protocols = lmtp service lmtp { inet_listener lmtp { address = 127.0.0.1 port = 24 } } userdb { args = uid=200 gid=200 home=/home/vmail driver = static } protocol lmtp { mail_plugins = sieve } # cat /home/vmail/.dovecot.sieve redirect "test(a)example.invalid"; stop; $ swaks --protocol lmtp -s 127.0.0.1 -f ulrich(a)topfen.net -t ulrich(a)topfen.net === Trying 127.0.0.1:24... === Connected to 127.0.0.1. <- 220 tuxi.topfen.net Dovecot ready. -> LHLO tuxi.topfen.net <- 250-tuxi.topfen.net <- 250-8BITMIME <- 250-CHUNKING <- 250-ENHANCEDSTATUSCODES <- 250-PIPELINING <- 250 VRFY -> MAIL FROM:<ulrich(a)topfen.net> <- 250 2.1.0 OK -> RCPT TO:<ulrich(a)topfen.net> <- 250 2.1.5 OK -> DATA <- 354 OK -> Date: Tue, 17 Apr 2018 18:44:42 +0200 -> To: ulrich(a)topfen.net -> From: ulrich(a)topfen.net -> Subject: test Tue, 17 Apr 2018 18:44:42 +0200 -> X-Mailer: swaks v20130209.0 jetmore.org/john/code/swaks/ -> -> This is a test mailing -> -> . <** 451 4.3.0 <ulrich(a)topfen.net> Temporary internal error -> QUIT <- 221 2.0.0 Bye === Connection closed with remote host. $ tail -n 10 /var/log/mail.log Apr 17 18:45:36 tuxi postfix/postdrop[22643]: warning: mail_queue_enter: create file maildrop/421882.22643: Permission denied Apr 17 18:45:36 tuxi dovecot: lmtp: Error: postdrop: warning: mail_queue_enter: create file maildrop/421882.22643: Permission denied Apr 17 18:45:36 tuxi dovecot: lmtp(ulrich(a)topfen.net)<22639><dtJZGJIk1lpvWAAAcdhj4Q>: Error: program `/usr/sbin/sendmail' was forcibly terminated with signal 15 Apr 17 18:45:36 tuxi dovecot: lmtp(ulrich(a)topfen.net)<22639><dtJZGJIk1lpvWAAAcdhj4Q>: Error: sieve: msgid=unspecified: failed to redirect message to <test(a)test.at>: Failed to execute sendmail (temporary failure) Apr 17 18:45:36 tuxi dovecot: lmtp(ulrich(a)topfen.net)<22639><dtJZGJIk1lpvWAAAcdhj4Q>: Error: sieve: Execution of script /home/vmail/.dovecot.sieve was aborted due to temporary failure (user logfile /home/vmail/.dovecot.sieve.log may reveal additional details) Apr 17 18:45:36 tuxi dovecot: lmtp(22639): Disconnect from 127.0.0.1: Client has quit the connection (state = READY) Apr 17 18:45:46 tuxi postfix/postdrop[22643]: warning: mail_queue_enter: create file maildrop/422091.22643: Permission denied Apr 17 18:45:46 tuxi dovecot: lmtp: Error: postdrop: warning: mail_queue_enter: create file maildrop/422091.22643: Permission denied Apr 17 18:45:56 tuxi postfix/postdrop[22643]: warning: mail_queue_enter: create file maildrop/422227.22643: Permission denied Apr 17 18:45:56 tuxi dovecot: lmtp: Error: postdrop: warning: mail_queue_enter: create file maildrop/422227.22643: Permission denied As far as I can tell, this is because Dovecot somehow does not allow suid programs to run (Postfix' postdrop(1), which is invoked by sendmail(1), requires set-gid to write the queue file). What can I do to change this (besides using SMTP from Dovecot directly)? I am using Ubuntu 16.04 and the Dovecot packages from the community repository: ~$ dpkg -l dovecot* | grep ^ii ii dovecot-core 2:2.3.1-1 amd64 secure POP3/IMAP server - core files ii dovecot-lmtpd 2:2.3.1-1 amd64 secure POP3/IMAP server - LMTP server ii dovecot-sieve 2:2.3.1-1 amd64 secure POP3/IMAP server - Sieve filters support Ulrich

2 2