I'm not sure if I understand your question, but it sounds like you have
an open mail relay. You need to configure sendmail so that users outside
your domain cannot relay mail through it.
On Thu, 11 Feb 1999 [EMAIL PROTECTED] wrote:
> Hi,
>
> We have a setup like -
> Mail server (Solaris 2.5.1) is directly connected to Internet and having
> Solistice Firewall installed. We have permitted telnet for some and Sendmail
> application for all.
> Users can pop there mails only.
> What we found that some user don't having the e-mail facility or having
> barred for some reason, are able to telnet at port 25 (i.e. for SMTP) and
> using the e-mail to and for as well.
> Can any body come out to explain, how does actually it works ? what are the
> ways to avoid it ?
>
> Thanks,
>
> Savi
>
> ---
>
> Any personal opinions expressed herein do not necessarily represent
> those of Omnipoint Technologies, Inc.
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