Hi,

I'm trying to migrate IMAP mails from dovecot 1.1.20apple0.5 (osx) to dovecot 2.2.33.2 (ubuntu). I'm using "doveadm backup" to migrate my data. It works fine for all subfolders, but the root INBOX stay empty on the new server. I suspect a problem related with hierarchy separator ("." on previous server, "/" on new) or with the namespace prefix (set to "INBOX/" on new server). Any hint?

Thanks.

show there is no messages in INBOX

# doveadm mailbox status -u (myuser) all INBOX

INBOX messages=0 recent=0 uidnext=1 uidvalidity=1553630060 unseen=0 highestmodseq=1 vsize=0 guid=d54cd42849739b5cb5790000ed87e144 firstsaved=18446744073709551615

show there is messages in subdirectory

# doveadm mailbox status -u (myuser) all INBOX/Sent

INBOX/Sent messages=253 recent=0 uidnext=8721 uidvalidity=1263328366 unseen=0 highestmodseq=256 vsize=16335358 guid=bfb2e03fdce327671e82bf173b1ccb8b firstsaved=1553634631

The command I'm runnning on the new server to migrate data:

# doveadm -o mail_fsync=never backup -R -u (myuser) imapc:

# My config on the new server:

# doveadm -n

# 2.2.33.2 (d6601f4ec): /etc/dovecot/dovecot.conf

# Pigeonhole version 0.4.21 (92477967)

# OS: Linux 4.15.0-46-generic x86_64 Ubuntu 18.04.2 LTS 

auth_default_realm = example.com

doveadm_password =  # hidden, use -P to show it

doveadm_port = 53683

first_valid_uid = 200

imapc_features = rfc822.size fetch-headers

imapc_host = oldmail.example.com

imapc_master_user = (removed)

imapc_password =  # hidden, use -P to show it

imapc_user = %n

last_valid_uid = 200

mail_location = mbox:~/mail:INBOX=/var/mail/%u

mail_plugins = " notify replication zlib quota"

mail_prefetch_count = 20

mail_privileged_group = mail

managesieve_notify_capability = mailto

managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext

mdbox_rotate_size = 10 M

namespace inbox {

  inbox = yes

  location = 

  mailbox "Éléments envoyés" {

    special_use = \Sent

  }

  mailbox "Éléments supprimés" {

    special_use = \Trash

  }

  mailbox Brouillon {

    special_use = \Drafts

  }

  mailbox "Courrier indésirable" {

    special_use = \Junk

  }

  mailbox Drafts {

    auto = subscribe

    special_use = \Drafts

  }

  mailbox Junk {

    auto = subscribe

    special_use = \Junk

  }

  mailbox Sent {

    auto = subscribe

    special_use = \Sent

  }

  mailbox "Sent Messages" {

    special_use = \Sent

  }

  mailbox Trash {

    auto = subscribe

    special_use = \Trash

  }

  prefix = INBOX/

  separator = /

}

passdb {

  args = /etc/dovecot/dovecot-ldap.conf.ext

  driver = ldap

}

plugin {

  mail_replica = tcps:mail2.example.com:53683

  quota = count:User quota

  quota_grace = 10%%

  quota_rule = *:storage=10G

  quota_rule2 = INBOX/Trash:storage=+100M

  quota_vsizes = yes

  quota_warning = storage=100%% quota-warning 100 %u

  quota_warning2 = storage=95%% quota-warning 95 %u

  quota_warning3 = storage=90%% quota-warning 90 %u

  quota_warning4 = storage=85%% quota-warning 85 %u

  quota_warning5 = storage=75%% quota-warning 75 %u

  quota_warning6 = -storage=80%% quota-warning '-80' %u

  quota_warning7 = -storage=100%% quota-warning '-100' %u

  sieve = /var/vmail/domains/%Ld/%Ln/.dovecot.sieve

  sieve_before = /var/vmail/sieve/before.sieve

  sieve_default = /var/vmail/sieve/default.sieve

  sieve_global = /var/vmail/sieve/global

  zlib_save = lz4

}

protocols = " imap lmtp sieve"

service aggregator {

  fifo_listener replication-notify-fifo {

    user = vmail

  }

  unix_listener replication-notify {

    user = vmail

  }

}

service auth {

  inet_listener {

    address = (removed)

    port = 55123

  }

  unix_listener /var/spool/postfix/private/auth {

    mode = 0666

  }

}

service doveadm {

  inet_listener {

    port = 53683

    ssl = yes

  }

}

service imap-login {

  inet_listener imap {

    port = 0

  }

  process_min_avail = 10

}

service lmtp {

  unix_listener /var/spool/postfix/private/dovecot-lmtp {

    group = postfix

    mode = 0660

    user = postfix

  }

}

service quota-warning {

  executable = script /usr/local/bin/quota-warning.sh

  unix_listener quota-warning {

    user = vmail

  }

}

service replicator {

  process_min_avail = 1

  unix_listener replicator-doveadm {

    mode = 0600

    user = vmail

  }

}

ssl = required

ssl_cert = </etc/ssl/example/example.com.crtbundle

ssl_client_ca_dir = /etc/ssl/certs

ssl_key =  # hidden, use -P to show it

userdb {

  args = /etc/dovecot/dovecot-ldap.conf.ext

  driver = ldap

}

verbose_proctitle = yes

protocol lmtp {

  mail_plugins = " notify replication zlib quota sieve"

  postmaster_address = postmaster@example.com

}

protocol imap {

  mail_plugins = " notify replication zlib quota imap_zlib imap_quota"

}

# cat /etc/dovecot/dovecot-ldap.conf.ext | grep -v "^#" | grep -v "^$"

uris = ldaps://dc1.ad.example.com ldaps://dc2.ad.example.com

dn = (removed)

dnpass = (removed)

auth_bind = yes

base = (removed)

scope = subtree

deref = never

user_filter = (&(mail=%u)(memberOf:1.2.840.113556.1.4.1941:=CN=acces_courriels,(removed))(&(|(objectclass=person))(!(UserAccountControl:1.2.840.113556.1.4.803:=2))))

pass_filter = (&(mail=%u)(memberOf:1.2.840.113556.1.4.1941:=CN=acces_courriels,(removed))(&(|(objectclass=person))(!(UserAccountControl:1.2.840.113556.1.4.803:=2))))

iterate_filter = (&(mail=*)(memberOf:1.2.840.113556.1.4.1941:=CN=acces_courriels,(removed))(&(|(objectclass=person))(!(UserAccountControl:1.2.840.113556.1.4.803:=2))))

iterate_attrs = mail=user

user_attrs = \

  =quota_rule=*:storage=%{ldap:division:10G}, \

  =home=/var/vmail/domains/%Ld/%Ln, \

  =mail=mdbox:/var/vmail/domains/%Ld/%Ln/mdbox, \

  =uid=200, \

  =gid=200