dovecot.conf

listen = *
auth_mechanisms = plain login
disable_plaintext_auth = no
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_location = maildir:/home/vmail/%d/%n
namespace {
  inbox = yes
  location =
  prefix = INBOX.
  separator = .
  type = private
}
# passdb {
#  driver = pam
# }
passdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
protocols = imap pop3

service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0600
    user = postfix
  }
  unix_listener auth-master {
    mode = 0600
    user = vmail
  }
  user = root
}

ssl = yes
ssl_cert = </var/lib/ssl/certs/dovecot.pem
ssl_key = </var/lib/ssl/private/dovecot.pem

userdb {
  driver = passwd
}
userdb {
  args = uid=501 gid=501 home=/home/vmail/%d/%n allow_all_users=yes
  driver = static
}
protocol pop3 {
  pop3_uidl_format = %08Xu%08Xv
}
protocol lda {
  auth_socket_path = /var/run/dovecot/auth-master
  log_path = /home/vmail/dovecot-deliver.log
  mail_plugins = sieve
  postmaster_address = postmaster@exa.ru
}

mail_debug = yes
auth_debug = yes
auth_debug_passwords = yes
debug_log_path = /var/log/mail/dovecot-debug.log