RE: fix.your.open.relay.or.die.net

James,

Are you sending from inside or outside your firewall? If you can do what you
mentioned (steps 1-4) and you're able to send to anyone from outside your
firewall please re-read sendmail.org, you are STILL an open relay.

-Walden


------------
Walden H Leverich III
President
Tech Software
(516)627-3800 x11
WaldenL@TechSoftInc.com
http://www.TechSoftInc.com



-----Original Message-----
From: James Rich [mailto:james@eaerich.com]
Sent: Wednesday, November 21, 2001 2:29 PM
To: 'midrange-l@midrange.com'
Subject: RE: fix.your.open.relay.or.die.net


On Wed, 21 Nov 2001, Walden H. Leverich wrote:

> James, you're referring (I believe) to a client "getting" mail. Brad
> is correct when referring to a SERVER "getting" mail. SMTP servers
> listen on port 25, that's how they "get" mail. BTW, you do have
> (should have!) firewall rules that ALLOW you to get your mail, they're
> just looking for the IMAP or POP3 ports.

Yes, I know that.  I thought Brad was referring to getting mail with a
client (i.e. reading his mail).  Usually "get" is not used when referring to
SMTP since SMTP server do not initiate anything to get mail, they only get
mail when someone sends it to them.  SMTP servers really only send, never
get.

By special firewall rules I meant things like port forwarding, timed waits,
etc.  The firewall is just a stateful firewall with pretty standard rules in
it.  Don't want to say too much more about it, though...

Fixing SMTP servers to not be open relays *and* allow clients to send email
from anywhere on the net is easy.  I believe most aren't sure of how their
SMTP services should be done, and enabling open relaying is easy and fixes
the problem.  Of course I may be somewhat naive about what some people's
SMTP needs are.  But for most this should work:

1. Close your open relay (see sendmail.org or read the bat book for info on
what an open relay is, how to close it, and to correctly route email).

2. Stick your email address into netscape

3. Stick your SMTP server into netscape

4. Send email

Works every time.

James Rich
james@eaerich.com

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