hello,
 by default sendmail 8.9.3 denies relaying. so just rename your existing
sendmail.cf. then generate a new sendmail.cf using m4 macro.
this will deny relaying on your mail server. i faced this problem
yesterday . 
regards
divakaran

On Fri, 5 Jan 2001, Dr.K.S.Sangunni wrote:

> Hello
> First please give proper subject so that other can respond
> 
> Try to use hosts.allow and hosts.deny. Add ALL:ALL in host.deny and add all
> the address that you want others to access your system in hosts.allow.
> 
> 
> Shirley Remedios wrote:
> 
> > i have a problem with my sendmail....
> >
> > We have a relay host server named mail.jobpartners.com which can accept
> > connections from any third party i want to restrict that to only the
> > jobpartners users..our mail goes from the internet to
> > mail.jobpartners.com to the firewall and then to exchange.At present
> > anybody can use mail.jobpartners.com as a relay and send mail..i want to
> > restrict incoming mail on mail.jobpartners.com so that it can receive
> > mails only from @jobpartners.com
> >
> > can u help
> >
> > ----------------------------------------------
> > LIH is all for free speech.  But it was created
> > for a purpose.  Violations of the rules of
> > this list will result in stern action.
> 
> 
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