Re: SMTP behind NAT

[Rob Taylor <rgt () wi mit edu>]

It helps avoid machines from sending out e-mail directly. These could be compromised machines sending spam, or, people 
emailing company secrets via a third party mail server.
At the very least, it forces them to send it through your local server, where it COULD (if you have the right software 
installed) be detected and dropped,
or at the least get logged. 

rgt

----- "Georg Pichler" <georg.pichler () gmail com> wrote:

> Hi Guys.
>
> I'm currently in a nat environment, where outbound connections to smtp
> and 
> smtps are blocked by a firewall. You are therefore forced (unless
> using vpn or 
> something alike) to send mail via a local smtp server. I was wondering
> whether 
> there is any sense in blocking these connections.
> What does the administrator gain by forcing everybody to a local open
> smtp 
> server? Can you avoid being put on some kind of blacklist by these
> means?
>
> I would very much appreciate an answer. Thanks in advance.
>
> Best regards,
> Georg Pichler

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