Re: [cobalt-users] How to stop SPAM senders?

["Zeffie" <cobaltlist@xxxxxxxx>]

First take a look at
http://poprelay.sourceforge.net/
This is designed to make your Sendmail program allow relaying from a certain
host for a short period of time after that host as authenticated itself via
a POP3 or IMAP connection
you can see the script and the usage at
http://poprelay.sourceforge.net/poprelayd

> I'm still puzzled. everything that is written in the forums, etc suggest
> that pop before SMTP is the best way to go. Otherwise, your server can be
> used as a relay for anyone.

Well you can't belive everything you hear... :)
I have great laughs reading some forms..  This one included.
nobody but the ip's you have configured to will be able to use sendmail.
poprelayd will add `your mail users` ip to the "list" of ip's that sendmail
will work for.

Sendmail does not depend on poprelayed.  it uses an access list.

> You don't need a password to use someone's sendmail. Therefore pop before
> SMTP makes the authorized user check their email, using their password
> before they are allowed to send any mail. With pop before SMTP unchecked,
> anyone can point to your sendmail server and send a message. It happens
> every day. So from everything I read, the safest way to prevent spam from
> routing through your server is to check pop before SMTP in the GUI.
> I would like you to show me articles where you read it is the other way
that
> is better.
> You are saying "turn off pop before SMTP to prevent some unauthorized
> spammer from using your sendmail"
> I say that's wrong.

I think you should be looking at your "control-panel > e-mail prameters >
relay box
(off the top of my head)

Zeffie
http://www.zeffie.com/