Sendmail/wrappers question

Jonathan Chen jonc at
Mon Aug 4 15:38:01 PDT 2003

On Mon, Aug 04, 2003 at 10:15:22PM +0100, Matthew Seaman wrote:
> On Mon, Aug 04, 2003 at 05:09:56PM -0400, Stephen Hovey wrote:
> > 
> > whats the surest way to prevent mail hosts with no reverse dns from being
> > able to connect/send email?
> > 
> > The hosts.allow example seem more accurately ident'ing and refusing than
> > check there is a reverse dns.
> > 
> > Any insight is appreciated! :)
> That's been covered on this list fairly recently:

And be aware that there are quite a few legitimate small servers out
there that _don't_ have a reverse DNS set up.. However, having said
that, the rules block a *LOT* of spam from China and Korea.

Jonathan Chen <jonc at>
                "I don't want to achive immortality through my works..
                 I want to achieve it through not dying" - Woody Allen

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