> -----Original Message-----
> From: Adrian Bolzan [mailto:[EMAIL PROTECTED]]
>
> I found that when I last used that feature our roaming
> (mobile laptop)
> users who used our mail server to relay e-mail could no longer send e-
> mail through our mail server- the proxy rejected them.
>
> As thi srelayign is vital we will set up a proxy on the PSN
> that passes
> smtp traffic to our mail server, that will authenicate using SASL.
Here's where I think you want to go:
1. Mailserver on the PSN that *REQUIRES* SMTP authentication from
the clients (because otherwise you have an open relay, which
is a *BAD* thing!)
2. Tunnel and filter (or tunnel with "automatic accept all")
an alias on the EXT to the mailserver for some combination of
ports 25 (SMTP), 110 (POP3) and 143 (IMAP)
3. Mailserver on the PRO that handles incoming and outbound
mail for users on your LAN
4. Email proxy to allow incoming email to be delivered to the
mailserver on the PRO
5. Tunnel and filter from the PSN address to the mailserver on
the PRO to allow the mailserver on the PSN to deliver mail
to the mailserver on the PRO. You should use a filter instead
of checking "automatic accept all" so that you can limit use
of this tunnel to the mailserver on the PSN.
6. The mailserver on the PRO should disallow relaying for SMTP
coming from the GNAT Box address.
The results:
1. Roaming users use the Alias on the EXT to send mail using the
mailserver on the PSN.
2. Hosts on the Internet use the primary EXT address to send
email to you. This should be the address that your MX record
points to.
3. Users on your LAN use the mailserver on the PRO for incoming
and outbound email.
Mike Burden
Lynk Systems
http://www.lynk.com
(616)532-4985
[EMAIL PROTECTED]
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