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:~#