Re: Mail Relaying

["Peter Dow" <pcdow@xxxxxxxxx>]

Hi Jon,

ClubTech (an email newsletter from News/400 at http://www.as400network.com)
recommends getting a mail server program for your mobile personnel. That way
they can send email direct to the recipient's mail server without going
through any other hops. Given that, you could then tighten up your mail
server to the fixed IP addresses.

"Free servers abound. My faves are ArGo Soft Mailserver Plus for Windows,
http://www.argosoft.com/applications/mailserver/ , and Eudora Internet Mail
Server for the Mac:
http://www.eudora.com/free/servers.html"  --Mel Beckman, NEWS/400 Senior
Technical Editor

I haven't tried it yet, but I intend to rsn (real soon now).

HTH,
Peter Dow
Dow Software Services, Inc.
909 425-0194 voice
909 425-0196 fax


----- Original Message -----
From: <Jon.Paris@hal.it>
To: <midrange-l@midrange.com>
Sent: Thursday, April 12, 2001 2:18 PM
Subject: Mail Relaying


> A prolonged period of frantic activity on our mail server (V4R4) last
night
> (80% + CPU!) led us to wonder if we were being used for relaying.  We
> tested and sure enough we were wide open.  We have set things up as per
> IBM's PTF cover letter on the subject but either I'm misunderstanding or I
> have a problem with IBM's implementation.  I'm hoping someone can set me
> straight.
>
> In order to block relaying you either have to specify which IPs cannot
> relay (not practical) or specify all those IPs which can.  This is the
> approach we have used but there is a problem.  Several of our users travel
> (me for one!) and often use e-mail from home or on the road.  I wouldn't
> have thought connecting as an e-mail client counted as relaying but it
> seems to.  Of course these users have a different IP each time they
> connect.  In order to make it work the way I understand it, we'd have to
> shut down the server - add the current IP and restart the server.  This
> just isn't viable - so I'm hoping that I've missed something somewhere.
>
> Can anyone enlighten me?
>
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