[ale] POP3 was SMTP Servers

[Chris Ricker]

On Tue, 31 Dec 2002, Jeff Hubbs wrote:

> Can someone recommend me to something that puts SMTP MTAs and POP3
> servers as well as things like Exchange into some kind of interrelated
> context?  
> 
> I'm not sure exactly what this company wants.  What I was told is "the
> boss would like to create a DMZ on the network and implement an SMTP
> server using Linux."  That's all the info that I have, but I assume that
> this is a place that already has Outlook/Exchange.  

First of all, get more information. They're going to be severely 
disappointed if they are using Outlook and its integrated groupware 
functions, and you come in and just set up an SMTP + POP / IMAP server.... 
Find out what clients they use now, and what features of those clients, then 
take it from there.

> Would a typical corporate mail system "done properly" (as opposed to
> Exchange handling everything) have a separate SMTP MTA (like
> qmail/sendmail/postfix) and POP3 server, or do those functions get
> integrated into the same machine?

Unless it's a really big corporation, typically separate software on the 
same machine. Typical sane corporate deployment is something like

internet -> sane smtp[1] -> antivirus -> smtp[2]

[1] most antivirus smtp software sucks (protocol / security wise). it should
never be directly exposed to the net.

[2] this could be a sane smtp implementation, or it could be something like 
exchange that should never be exposed to the internet

How this is set up in terms of number of machines depends on the load, 
budget, software being used, etc.

later,
chris
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