On 6 Jan 2023, at 16:49, Paul Kudla <paul@scom.ca> wrote:

i ran into this as well

here is the full config for mine with replication

# cat dovecot.conf
# 2.3.14 (cee3cbc0d): /usr/local/etc/dovecot/dovecot.conf
# OS: FreeBSD 12.1-RELEASE amd64
# Hostname: mail18.scom.ca

auth_debug = no
auth_debug_passwords = no

default_process_limit = 16384

mail_debug = no

#lock_method = dotlock
#mail_max_lock_timeout = 300s

#mbox_read_locks = dotlock
#mbox_write_locks = dotlock

mmap_disable = yes
dotlock_use_excl = no
mail_fsync = always
mail_nfs_storage = no
mail_nfs_index = no

auth_mechanisms = plain login
auth_verbose = yes
base_dir = /data/dovecot/run/
debug_log_path = syslog
disable_plaintext_auth = no
dsync_features = empty-header-workaround

info_log_path = syslog
login_greeting = SCOM.CA Internet Services Inc. - Dovecot ready
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c


mail_location = maildir:~/

mail_plugins = " virtual notify replication fts fts_lucene "
mail_prefetch_count = 20

protocols = imap pop3 lmtp sieve


protocol lmtp {
 mail_plugins = $mail_plugins sieve
 postmaster_address =
}

service lmtp {
 process_limit=1000
 vsz_limit = 512m
 client_limit=1
  unix_listener /usr/home/postfix.local/private/dovecot-lmtp {
    group = postfix
    mode = 0600
    user = postfix
 }
}

protocol lda {
 mail_plugins = $mail_plugins sieve
}

service lda {
 process_limit=1000
 vsz_limit = 512m
}

service imap {
 process_limit=4096
 vsz_limit = 2g
 client_limit=1
}

service pop3 {
 process_limit=1000
 vsz_limit = 512m
 client_limit=1
}

namespace inbox {
 inbox = yes
 location =
 mailbox Drafts {
   auto = subscribe
   special_use = \Drafts
 }
 mailbox Sent {
   auto = subscribe
   special_use = \Sent
 }
 mailbox Trash {
   auto = subscribe
   special_use = \Trash
 }
 prefix =
 separator = /
}

passdb {
 args = /usr/local/etc/dovecot/dovecot-pgsql.conf
 driver = sql
}

doveadm_port = 12345
doveadm_password = secretxxxx

service doveadm {
 process_limit = 0
 process_min_avail = 0
 idle_kill = 0
 client_limit = 1
 user = vmail
 inet_listener {
   port = 12345
 }
}

service config {
 unix_listener config {
   user = vmail
   }
}

dsync_remote_cmd = ssh -l%{login} %{host} doveadm dsync-server -u%u
#dsync_remote_cmd = doveadm sync -d -u%u

replication_dsync_parameters = -d -N -l 300 -U

plugin {
 mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename
 mail_log_fields = uid, box, msgid, from, subject, size, vsize, flags
 push_notification_driver = dlog

 sieve = file:~/sieve;active=~/sieve/.dovecot.sieve
 #sieve = ~/.dovecot.sieve
 sieve_duplicate_default_period = 1h
 sieve_duplicate_max_period = 1h
 sieve_extensions = +duplicate +notify +imapflags +vacation-seconds
 sieve_global_dir = /usr/local/etc/dovecot/sieve
 sieve_before = /usr/local/etc/dovecot/sieve/duplicates.sieve


 mail_replica = tcp:10.221.0.19:12345
 #mail_replica = remote:vmail@10.221.0.19
 #replication_sync_timeout = 2

 fts = lucene
 fts_lucene = whitespace_chars=@.
       fts_autoindex = yes
       fts_languages = en
}

#sieve_extensions = vnd.dovecot.duplicate

#sieve_plugins = vnd.dovecot.duplicate

service anvil {
 process_limit = 1
 client_limit=5000
 vsz_limit = 512m
 unix_listener anvil {
   group = vmail
   mode = 0666
 }
}

service indexer-worker {
       vsz_limit = 2g
}



service auth {
  process_limit = 1
  client_limit=5000
  vsz_limit = 1g

  unix_listener auth-userdb {
     mode = 0660
     user = vmail
     group = vmail
  }
  unix_listener /var/spool/postfix/private/auth {
     mode = 0666
  }

}

service stats {
 process_limit = 1000
 vsz_limit = 1g
 unix_listener stats-reader {
   group = vmail
   mode = 0666
 }
 unix_listener stats-writer {
   group = vmail
   mode = 0666
 }
}
userdb {
 args = /usr/local/etc/dovecot/dovecot-pgsql.conf
 driver = sql

}

protocol imap {
 mail_max_userip_connections = 50
 mail_plugins = $mail_plugins notify replication
}

protocol pop3 {
 mail_max_userip_connections = 50
 mail_plugins = $mail_plugins notify replication
}

protocol imaps {
 mail_max_userip_connections = 25
 mail_plugins = $mail_plugins notify replication
}

protocol pop3s {
 mail_max_userip_connections = 25
 mail_plugins = $mail_plugins notify replication
}


service managesieve-login {
 process_limit = 1000
 vsz_limit = 1g
 inet_listener sieve {
   port = 4190
 }
}

verbose_proctitle = yes

replication_max_conns = 100

replication_full_sync_interval = 1d

service replicator {
 client_limit = 0
 drop_priv_before_exec = no
 idle_kill = 4294967295s
 process_limit = 1
 process_min_avail = 0
 service_count = 0
 vsz_limit = 8g
       unix_listener replicator-doveadm {
   mode = 0600
   user = vmail
 }
 vsz_limit = 8192M
}


service aggregator {
 process_limit = 1000
 #vsz_limit = 1g
 fifo_listener replication-notify-fifo {
   user = vmail
   group = vmail
   mode = 0666
 }

}

service pop3-login {
 process_limit = 1000
 client_limit = 100
 vsz_limit = 512m
}


service imap-urlauth-login {
 process_limit = 1000
 client_limit = 1000
 vsz_limit = 1g
}


service imap-login {
 process_limit=1000
 client_limit = 1000
 vsz_limit = 1g
}


protocol sieve {
 managesieve_implementation_string = Dovecot Pigeonhole
 managesieve_max_line_length = 65536
}




#Addition ssl config
!include sni.conf

with sni cert support (examples)

# cat sni.conf
#sni.conf
ssl = yes
verbose_ssl = yes
ssl_dh =</usr/local/etc/dovecot/dh-4096.pem
ssl_prefer_server_ciphers = yes
#ssl_min_protocol = TLSv1.2

#Default *.scom.ca
ssl_key =</usr/local/etc/dovecot/scom.pem
ssl_cert =</usr/local/etc/dovecot/scom.pem
ssl_ca =</usr/local/etc/dovecot/scom.pem

local_name .scom.ca {
ssl_key =</usr/local/etc/dovecot/scom.pem
ssl_cert =</usr/local/etc/dovecot/scom.pem
ssl_ca =</usr/local/etc/dovecot/scom.pem

}

local_name mail.clancyca.com {
 ssl_key =</usr/local/etc/dovecot/cert/mail.clancyca.com
 ssl_cert =</usr/local/etc/dovecot/cert/mail.clancyca.com
 ssl_ca =</usr/local/etc/dovecot/cert/mail.clancyca.com
}

local_name mail.paulkudla.net {
 ssl_key =</usr/local/etc/dovecot/cert/mail.paulkudla.net
 ssl_cert =</usr/local/etc/dovecot/cert/mail.paulkudla.net
 ssl_ca =</usr/local/etc/dovecot/cert/mail.paulkudla.net
}

local_name mail.ekst.ca {
 ssl_key =</usr/local/etc/dovecot/cert/mail.ekst.ca
 ssl_cert =</usr/local/etc/dovecot/cert/mail.ekst.ca
 ssl_ca =</usr/local/etc/dovecot/cert/mail.ekst.ca
}

local_name mail.hamletdevelopments.ca {
 ssl_key =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
 ssl_cert =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
 ssl_ca =</usr/local/etc/dovecot/cert/mail.hamletdevelopments.ca
}

pg sql support supporting replication

# cat dovecot-pgsql.conf
driver = pgsql
connect = host=localhost port=5433 dbname=scom_billing user=pgsql password=
default_pass_scheme = PLAIN

password_query = SELECT username as user, password FROM email_users WHERE username = '%u' and password <> 'alias' and status = True and destination = '%u'

user_query = SELECT home, uid, gid FROM email_users WHERE username = '%u' and password <> 'alias' and status = True and destination = '%u'

#iterate_query = SELECT user, password FROM email_users WHERE username = '%u' and password <> 'alias' and status = True and destination = '%u'

iterate_query = SELECT "username" as user, domain FROM email_users WHERE status = True and alias_flag = False





Happy Friday !!!
Thanks - paul

Paul Kudla


Scom.ca Internet Services <http://www.scom.ca>
004-1009 Byron Street South
Whitby, Ontario - Canada
L1N 4S3

Toronto 416.642.7266
Main 1.866.411.7266
Fax 1.888.892.7266
Email paul@scom.ca

On 1/6/2023 5:32 AM, Gerben Wierda wrote:

On 6 Jan 2023, at 08:53, Aki Tuomi <aki.tuomi@open-xchange.com <mailto:aki.tuomi@open-xchange.com>> wrote:



On January 6, 2023 3:56:39 AM GMT+02:00, Gerben Wierda <gerben.wierda@rna.nl <mailto:gerben.wierda@rna.nl>> wrote:

One step further in my quest to create a replacement mail server.

I now have my old mail server (2.3.19.1, macOS + MacPorts) and my new (2.3.20, Alpine Linux, Docker, apk package). When I turn on replication it works, but, after a while I see:

Jan 06 00:50:31 replicator: Panic: data stack: Out of memory when allocating 268435496 bytes
Jan 06 00:50:32 replicator: Fatal: master: service(replicator): child 133 killed with signal 6 (core dumped)
Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): Sync failure:
Jan 06 00:50:32 lmtp(pid 195 user sysbh): Warning: replication(sysbh): Remote sent invalid input: -

I've removed synchronous operation for now (found a message on the net suggesting that) but is this known and what does it mean?

Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda <https://www.linkedin.com/in/gerbenwierda>>)
R&A IT Strategy <https://ea.rna.nl/ <https://ea.rna.nl/>> (main site)
Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/ <https://ea.rna.nl/the-book/>>
Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/ <https://ea.rna.nl/the-book-edition-iii/>>

Dovecot default memory limit is 256M. You should probably set

service replicator {
 vsz_limit = 2G
}

because replicator might have to use more memory, especially for larger indexes.

Aki

That is a good tip as well.
I had followed this bit of experience from someone else: https://marc.info/?l=dovecot&m=164438199727640 <https://marc.info/?l=dovecot&m=164438199727640>, haven't seen any err message since. But that might be because they are in sync now and both sides are aware. Can I trigger full replication again so I can test?
Gerben
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