• DovecotServerInstallations
• Gentoo
• 200Users

• Server: Intel(R) Xeon(R) CPU 5110 @ 1.60GHz

• OS: Gentoo Linux, Profile: default/linux/amd64/10.0/server

• RAM: 2 Gb

• Storage: 2x 500 Gb SATA, Hardware-RAID, Level 1

• Users: ~200

• Authentication: pam_ldap

• Total Maildir Size: 50 Gb (used)

• Users Maildir Size: Range of 0Mb to 2000Mb.

• Dovecot version: 2.0.13

• MDA: postfix

• Configuration:

Edited output of # dovecot -n

# 2.0.13: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.31-gentoo-r6-IB x86_64 Gentoo Base System release 2.0.2 
auth_cache_size = 10 M
auth_mechanisms = plain login
hostname = mail.serversystemsname.com
info_log_path = /var/log/dovecot.log
listen = *
mail_fsync = never
mail_location = maildir:~/Maildir
mail_plugins = quota acl autocreate zlib
mail_privileged_group = mail
maildir_very_dirty_syncs = yes
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
namespace {
  inbox = yes
  location = 
  prefix = 
  separator = /
  type = private
}
namespace {
  list = yes
  location = maildir:/home/Public/Maildir:CONTROL=~/Maildir/control/Public:INDEX=~/Maildir/index/Public
  prefix = Public/
  separator = /
  type = public
}
passdb {
  args = *
  driver = pam
}
passdb {
  driver = passwd
}
passdb {
  driver = shadow
}
plugin {
  autocreate = Trash
  autocreate2 = Junk
  autocreate3 = Sent
  autocreate4 = Drafts
  deleted_to_trash_folder = Trash
  quota = maildir:User quota
  quota_rule = *:storage=1850M
  quota_rule2 = Trash:storage=+100M
  quota_warning = storage=95%% quota-warning 95 %u
  quota_warning2 = storage=85%% quota-warning 85 %u
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
protocols = imap lmtp sieve
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
  }
}
service imap-login {
  inet_listener imaps {
    ssl = yes
  }
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
}
service quota-warning {
  executable = script /usr/bin/dovecot-quota-warning.sh
  user = dovecot
}
ssl_cert = </etc/ssl/cert.pem
ssl_key = </etc/ssl/cert.key
userdb {
  driver = passwd
}
protocol lmtp {
  mail_fsync = optimized
}
protocol lda {
  mail_fsync = optimized
  mail_plugins = sieve
}
protocol imap {
  imap_client_workarounds = delay-newmail tb-extra-mailbox-sep
  mail_plugins = quota acl autocreate zlib imap_quota imap_acl deleted_to_trash
}