まず、この辺注意
cyrus-sasl-devel
cyrus-sasl-md5
cyrus-sasl-plain
/etc/dovecot/dovecot.conf を編集
変更 ( IPv6をリスンしない場合 )
listen = *
/etc/dovecot/conf.d/10-auth.confを編集
disable_plaintext_auth = no
auth_mechanisms = plain login
/etc/dovecot/conf.d/10-mail.confを編集
mail_location = maildir:~/Maildir
/etc/dovecot/conf.d/10-master.conf を編集
# Postfix smtp-auth
unix_listener /var/spool/postfix/private/auth {
mode = 0666
user = postfix
group = postfix
}