outbound email gateway
Outbound email gateway or smarthost,
sends mail over the internet on behalf of the internal servers.
An outbound gateway receives mails from the internal servers who don’t want to send mail directly,
instead they deliver their email to the intermediary server for the final delivery.
The smarthost system receives mail from the internal systems based on the relay authentication,
if necessary, a relay without authentication can be configured.
Topics in this area:
digitally signed email messages: spf, dkim and secure email authentication
dedicated IP addresses are significant for relationships on the Internet
use your own subdomain, such as: smtp.yourdomain.com
smooth change from your current mailserver to RealSender
send email messages to the mobile world