david cuando uno mando los errores que da un programa o algo deben especificar las versiones de los sistemas operativos y en este caso de iredmail
y tampoco se dirigen mensajes de forma personal

aca te mando un dovecot que arregle hace como una semana para un amigo
un openvz sin ipv6 con debian 7.1 o 7.5 no recuerdo y con iredmail 0.8.6

espero que resuelvas el problema con esta conf

# Listen addresses.
#   - '*' means all available IPv4 addresses.
#   - '[::]' means all available IPv6 addresses.
# Listen on all available addresses by default
listen = *

#base_dir = /var/run/dovecot
mail_plugins = quota

# Enabled mail protocols.
protocols = pop3 imap sieve

# User/group who owns the message files:
mail_uid = 2000
mail_gid = 2000

# Assign uid to virtual users.
first_valid_uid = 2000
last_valid_uid = 2000

# Logging. Reference: http://wiki2.dovecot.org/Logging
log_path = /var/log/dovecot.log
mail_debug = no
auth_verbose = no
auth_debug = no
auth_debug_passwords = no
# Possible values: no, plain, sha1.
auth_verbose_passwords = no

# SSL: Global settings.
# Refer to wiki site for per protocol, ip, server name SSL settings:
# http://wiki2.dovecot.org/SSL/DovecotConfiguration
#ssl = required
verbose_ssl = no
#ssl_ca =</path/to/ca
ssl_cert = </etc/ssl/certs/iRedMail_CA.pem
ssl_key = </etc/ssl/private/iRedMail.key
ssl=no
# With disable_plaintext_auth=yes AND ssl=required, STARTTLS is mandatory.
# Set disable_plaintext_auth=no AND ssl=yes to allow plain password transmitted
# insecurely.
disable_plaintext_auth = no
# Allow plain text password per IP address/net
#remote 192.168.0.0/24 {
#   disable_plaintext_auth = no
#}

# Mail location and mailbox format.
mail_location = maildir:/%Lh/Maildir/:INDEX=/%Lh/Maildir/

# Authentication related settings.
# Append this domain name if client gives empty realm.
auth_default_realm = ipi.ss.rimed.cu

# Authentication mechanisms.
auth_mechanisms = PLAIN LOGIN

# Limits the number of users that can be logging in at the same time.
# Default is 100.
# Note: this value can be overrided by "process_limit =" in service
#       protocol. e.g.
#       protocol imap-login {
#           process_limit = 500
#       }
#default_process_limit = 100

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

# Virtual mail accounts.
userdb {
    args = /etc/dovecot/dovecot-ldap.conf
    driver = ldap
}
passdb {
    args = /etc/dovecot/dovecot-ldap.conf
    driver = ldap
}

# Master user.
# Master users are able to log in as other users. It's also possible to
# directly log in as any user using a master password, although this isn't
# recommended.
# Reference: http://wiki2.dovecot.org/Authentication/MasterUsers
auth_master_user_separator = *
passdb {
    driver = passwd-file
    args = /etc/dovecot/dovecot-master-users-password
    master = yes
}

plugin {
    auth_socket_path = /var/run/dovecot/auth-master

    quota = dict:user::proxy::quotadict
    quota_rule = *:storage=1G
    #quota_rule2 = *:messages=0
    #quota_rule3 = Trash:storage=1G
    #quota_rule4 = Junk:ignore

    # Quota warning.
    # If user suddenly receives a huge mail and the quota jumps from
    # 85% to 95%, only the 95% script is executed.
    quota_warning = storage=85%% quota-warning 85 %u
    quota_warning2 = storage=90%% quota-warning 90 %u
    quota_warning3 = storage=95%% quota-warning 95 %u

    # Plugin: autocreate. Create and subscribe to default IMAP folders.
    autocreate = INBOX
    autocreate2 = Sent
    autocreate3 = Trash
    autocreate4 = Drafts
    autocreate5 = Junk
    autosubscribe = INBOX
    autosubscribe2 = Sent
    autosubscribe3 = Trash
    autosubscribe4 = Drafts
    autosubscribe5 = Junk

    # Plugin: expire.
    #expire = Trash 7 Trash/* 7 Junk 30
    #expire_dict = proxy::expire

    # ACL and share folder
    acl = vfile
    acl_shared_dict = proxy::acl

    # By default Dovecot doesn't allow using the IMAP "anyone" or
    # "authenticated" identifier, because it would be an easy way to spam
    # other users in the system. If you wish to allow it,
    #acl_anyone = allow

    # Pigeonhole managesieve service.
    # Reference: http://wiki2.dovecot.org/Pigeonhole/Sieve/Configuration
    # Per-user sieve settings.
    sieve_dir = /%Lh/sieve
    sieve = /%Lh/sieve/dovecot.sieve

    # Global sieve settings.
    sieve_global_dir = /var/vmail/sieve
    sieve_global_path = /var/vmail/sieve/dovecot.sieve
    #sieve_before =
    #sieve_after =

    # The maximum number of redirect actions that can be performed during a
# single script execution. The meaning of 0 differs based on your version. # For versions v0.3.0 and beyond this means that redirect is prohibited. # For older versions, however, this means that the number of redirects is
    # unlimited, so be careful.
    #sieve_max_redirects = 4
}

service quota-warning {
    executable = script /usr/local/bin/dovecot-quota-warning.sh
    unix_listener quota-warning {
        user = vmail
        group = vmail
        mode = 0660
    }
}

service dict {
    unix_listener dict {
        mode = 0660
        user = vmail
        group = vmail
    }
}

dict {
    #expire = db:/var/lib/dovecot/expire/expire.db
    quotadict = mysql:/etc/dovecot/dovecot-used-quota.conf
    acl = mysql:/etc/dovecot/dovecot-share-folder.conf
}

protocol lda {
    # Reference: http://wiki2.dovecot.org/LDA
    mail_plugins = $mail_plugins sieve autocreate
    auth_socket_path = /var/run/dovecot/auth-master
    log_path = /var/log/sieve.log
    lda_mailbox_autocreate = yes
    postmaster_address = root
}
protocol imap {
    mail_plugins = $mail_plugins imap_quota autocreate
    imap_client_workarounds = tb-extra-mailbox-sep

# Maximum number of IMAP connections allowed for a user from each IP address.
    # NOTE: The username is compared case-sensitively.
    # Default is 10.
    # Increase it to avoid issue like below:
    # "Maximum number of concurrent IMAP connections exceeded"
    #mail_max_userip_connections = 20
}
protocol pop3 {
    mail_plugins = $mail_plugins
    pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
    pop3_uidl_format = %08Xu%08Xv

# Maximum number of IMAP connections allowed for a user from each IP address.
    # NOTE: The username is compared case-sensitively.
    # Default is 10.
    #mail_max_userip_connections = 20
}

# Login processes. Refer to Dovecot wiki for more details:
# http://wiki2.dovecot.org/LoginProcess
service imap-login {
    service_count = 1

# To avoid startup latency for new client connections, set process_min_avail # to higher than zero. That many idling processes are always kept around
    # waiting for new connections.
    #process_min_avail = 0

    # Process limit.
    # Increase it if you got similar error message in Dovecot log file:
    #
    # "master: Warning: service(imap-login): process_limit (100) reached,
    # client connections are being dropped"
    #
    #process_limit = $default_process_limit
    process_limit = 500

    # vsz_limit should be fine at its default 64MB value
    #vsz_limit = 64M
}
service pop3-login {
    service_count = 1
}

namespace {
    type = private
    separator = /
    prefix =
    #location defaults to mail_location.
    inbox = yes
}

namespace {
    type = shared
    separator = /
    prefix = Shared/%%u/
    location = maildir:/%%Lh/Maildir/:INDEX=/%%Lh/Maildir/Shared/%%u
    # this namespace should handle its own subscriptions or not.
    subscriptions = yes
    list = children
}

# Public mailboxes.
# Refer to Dovecot wiki page for more details:
# http://wiki2.dovecot.org/SharedMailboxes/Public
#namespace {
#    type = public
#    separator = /
#    prefix = Public/
#
#    # CONTROL=: Mark this public folder as read-only mailbox
#    # INDEX=: Per-user \Seen flag
# location = maildir:/var/vmail/public/:CONTROL=~/Maildir/public:INDEX=~/Maildir/public
#
#    # Allow users to subscribe to the public folders.
#    subscriptions = yes
#}


El 20/05/2014 9:33, da...@eniacfg.co.cu escribió:
para Jorge Luis Gutiérrez
tu resolvistes el problema que planteastes sobre mi mismo caso el que no podias conectar clientes de correo al iredmail
yo hice lo que puso Yoslan Jimenez

#############
ssl = required cambiarla por ssl = yes
disable_plaintext_auth = yes y poner disable_plaintext_auth = no
reiniciar el dovecot y todo pincha
#############

y nada todavia sigo con el mismo problema



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