Email Gateway Using Mdaemon6

Email Gateways

Using MDaemon 6.0

Alt-N Technologies, Ltd

1179 Corporate Drive West, #103

Arlington, TX 76006

Tel: (817) 652-0204

© 2002 Alt-N Technologies. All rights reserved.

Product and company names mentioned in this document may be trademarks.

Email Gateways 2 Alt-N Technologies

Contents

Abstract ............................................................................................................. 3

Gateways ........................................................................................................... 4

Real Life Gateways........................................................................................ 4

Digital Gateways............................................................................................ 4

Email Gateways............................................................................................. 5

MDaemon Gateways ......................................................................................... 7

MDaemon Gateway Applications ................................................................... 7

Service to Multiple Domains ..................................................................... 7

Security Front End.................................................................................... 7

Virus and Spam Front End........................................................................ 7

Low Cost Dial Up Interface ....................................................................... 7

Live Backup.............................................................................................. 7

Manual Configuration................................................................................ 8

Automatic Configuration ........................................................................... 8

Gateway Configuration................................................................................... 8

Manual Gateway Configuration................................................................. 8

Domain Settings.................................................................................. 9

Mail Forwarding................................................................................. 10

ATRN/ERTN/DomainPOP................................................................. 11

Quotas .............................................................................................. 14

Automatic Gateway Configuration........................................................... 15

Email Gateways 3 Alt-N Technologies

Abstract

An email gateway collects, stores and forwards messages to a primary domain

server. A gateway typically has no individual accounts. Email gateways can help

both large and small enterprises solve some of the problems inherit to Internet

email services. For a small organization, a gateway can make a private email

domain affordable. This is because a service provider supplies the gateway at a

reasonable cost by sharing the hardware and software with other smaller

ventures. The primary domains in such cases can have either permanent or

dialup connections to the Internet. Larger establishments can employ securityhardened

gateways to provide protection and content filtering for their more

vulnerable enterprise email systems. Gateways can also be configured to supply

automatic realtime mail storage backup when a primary domain goes offline for

any reason. One copy of MDaemon can simultaneously operate gateways for

dozens of email domains, even while running a primary domain server of its own.

Email Gateways 4 Alt-N Technologies

Gateways

Real Life Gateways

In real life a gateway regulates

the flow of people and things. It

might be a revolving door, a

traffic light, a turnstile or, well,

a gate. Gateways serve many

purposes. On the street the

traffic light increases safety

and usually smooths the

movement of traffic. The gate

at the concert hall slows the

inflow of the crowd for the

ticket taker. The amusement

park gateway limits the number

of people who can get on a

ride. In theory, gateways may

sound like restrictive devices,

but in practice, they improve

the quality of life. In or out, a

gateway regulates clutter.

Digital Gateways

A gateway in a digital communications network is a machine connected to the

Internet or some other large system. The gateway shares its connection with

other computers