MTA server, postfix + Dovecot

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
anvil_rate_time_unit = 2s
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
default_destination_concurrency_limit = 200
default_destination_recipient_limit = 1
default_process_limit = 1500
disable_dns_lookups = yes
header_checks = pcre:/etc/postfix/header_checks
inet_interfaces = all
lmtp_connect_timeout = 5s
lmtp_connection_cache_time_limit = 8s
lmtp_connection_reuse_time_limit = 4s
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
maximal_backoff_time = 60s
message_size_limit = 45000000
minimal_backoff_time = 25s
mydestination = $myhostname, localhost
mydomain = DOMAIN.com.br
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.50.0.0/23
myorigin = /etc/mailname
qmqpd_authorized_clients = 10.1.0.0/20
queue_run_delay = 25s
readme_directory = no
recipient_bcc_maps = proxy:mysql:/etc/postfix/maps/forward.cf
recipient_delimiter = +
relayhost = *.*.*.*
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_client_connection_count_limit = 8
smtpd_client_connection_rate_limit = 15
smtpd_client_message_rate_limit = 16
smtpd_client_recipient_rate_limit = 100
smtpd_delay_open_until_valid_rcpt = yes
smtpd_recipient_limit = 70
virtual_alias_maps = cdb:/etc/postfix/maps/locamail-expand-groups, tcp:127.0.0.1:25002
virtual_mailbox_domains = proxy:mysql:/etc/postfix/maps/domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/maps/accounts.cf
virtual_transport = lmtp:unix:/tmp/dspam.sock


Dovecot

# 2.0.11 (8c409049402c): /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-5-vserver-amd64 x86_64 Debian 6.0
auth_cache_negative_ttl = 10 mins
auth_cache_size = 10 M
default_client_limit = 2048
default_process_limit = 500
dict {
  quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext
}
first_valid_uid = 50
lda_mailbox_autocreate = yes
lda_mailbox_autosubscribe = yes
login_greeting = Welcome to DOMAIN
mail_access_groups = _sysadms
mail_debug = yes
mail_fsync = always
mail_location = maildir:%h:INDEX=%h/cache
mail_nfs_index = yes
mail_nfs_storage = yes
mail_plugins = " quota"
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
mmap_disable = yes
passdb {
  args = /etc/dovecot/conf.d/DOMAIN/passdb-master.conf
  driver = sql
}
plugin {
  quota = dict:User quota::proxy::quota
  quota_rule = *:storage=2G
  quota_rule2 = INBOX:messages=+50000
  sieve = ~/.dovecot.sieve
  sieve_before = /etc/dovecot/sieve/
  sieve_dir = ~/sieve
}
postmaster_address = scrum-email@DOMAIN.com.br
protocols = " lmtp sieve"
service auth-worker {
  process_limit = 1024
  process_min_avail = 100
}
service dict {
  unix_listener dict {
    group = _sysadms
    mode = 0660
  }
}
service lmtp {
  inet_listener lmtp {
    port = 24
  }
  process_min_avail = 100
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
  args = /etc/dovecot/conf.d/DOMAIN/userdb.conf
  driver = sql
}
verbose_proctitle = yes
protocol lmtp {
  mail_plugins = " quota sieve"
}
protocol imap {
  mail_plugins = " quota imap_quota"
}