myhostname = [host name]
    alias_maps = hash:/etc/aliases
    alias_database = hash:/etc/aliases
    myorigin = /etc/mailname
    mydestination = [list for local delivery]
    relayhost = [the MTA name for sending emails]
    mynetworks = [see posfix documentation]
    mailbox_size_limit = [you would rather set it!]
    recipient_delimiter = +
    inet_interfaces = all
    inet_protocols = ipv4
    mail_spool_directory = /var/mail