[NTLUG:Discuss] Sendmail/SPAM

[Greg Edwards]

"Joey L. Berry" wrote:
> 
> We are running  Sendmail 8.11.0 & Sun 5.7 on our mail servers at work, the
> SPAM our users have been getting is increasing at a very sad rate. I found
> that anyone could connect to the sendmail port issue a simple helo command &
> start sending mail from our servers. Indeed the IP was in syslog however I
> would like to disable this if it is an option. We feel this is were some if
> not most of the spam is coming from. Does any one know if this is a sendmail
> or Solaris issue? And how we can disable this option?
> 
> Thanks in advance,
> 
> Joey
> 

Joey,

Sendmail has an option that lets you diable relay and provides several
anti-spam filters.  I haven't done the research into the how of setting
it up yet so I can't tell you how but my can it do it research says it's
doable.  I have played with it a little in the linuxconf interface and
managed to completely lock down my sendmail, even from internal users:(

Either get the O'Reilly book "Sendmail" or dig through the docs that
come with the source.

-- 
Greg Edwards
New Age Software, Inc.
http://www.nas-inet.com