On Mon, Jun 21, 2010 at 2:33 PM, roland <rol...@cat.be> wrote:

> Now I would like to send mail from the outside (internet) and use this
> server as a send mail server, without risking to open the gates for
> everybody to relay.
>
> I have no fixed WAN-IP. I use dyndns.org.
>
> How can I do this without worry.

Maybe these can help :-)

http://www.sendmail.org/~ca/email/starttls.html
http://www.sendmail.org/~ca/email/auth.html

-- 
Kind Regards,
Mike Guilmot
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