[NTLUG:Discuss] Sendmail/SPAM

[Joey L. Berry]

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