Dovecot

Dovecot is a IMAP/POP3 server.

To install on Debian/Ubuntu, run

apt install dovecot-core -y

To see dovecot config, run

root@ok:~# doveconf -n
# 2.2.22 (fe789d2): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.13 (7b14904)
# OS: Linux 4.4.0-62-generic x86_64 Ubuntu 16.04.3 LTS 
mail_location = mbox:~/mail:INBOX=/var/mail/%u
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  driver = pam
}
ssl = no
userdb {
  driver = passwd
}
root@ok:~#