Re: Blocking IP for eMail

From: John Elsbury (johne_at_neveryoumind.co.nz)
Date: 08/05/03 

Date: Tue, 05 Aug 2003 00:39:06 GMT

On Mon, 04 Aug 2003 11:35:00 GMT, "news.east.earthlink.net"
<nospam@nospam.com> wrote:

> I have a SonicWall Pro and I've been trying to create a rule to block
>an IP range to prevent SPAM. I've tried blocking the reange from SMTP and
>DEFAULT.
>
> Neither seems to work. Does DEFAULT include eMail services? What should
>I use to block a sender of eMail?
>

Are you running a mail transfer agent (MTA) - i.e. do you have a
domain and an MX record?

If you do then you should be seeing, and should be able to block by IP
address, smtp connections from the spam originating / relaying ISP at
your firewall. Better yet, configure your MTA to use one of the
DSNBLs such as SPEWS, SPAMCOP, etc.

If you don't then you will most likely only be receiving e-mail from
your ISP's mail server. You wouldn't want to block that, you wouldn't
get any mail at all.

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