README.md

Edit Dovecot main configuration file to allow IMAP, POP3 and LMPT protocols. Edit file /etc/dovecot/dovecot.conf

protocols = imap pop3 lmtp

Edit Mailbox location for mail users. Edit file /etc/dovecot/conf.d/10-mail.conf

mail_location = maildir:~/Maildir

Edit authentication process. Edit file /etc/dovecot/conf.d/10-auth.conf

disable_plaintext_auth = yes

auth_mechanisms = plain login

Edit master process. Add an Postfix Unix Listener in service auth. Edit file /etc/dovecot/conf.d/10-master.conf

service auth {
  ...
  unix_listener /var/spool/postfix/private/auth {
    mode = 0660
    user = postfix
    group = postfix
  }
  ...
}