Re: Sendmail and fetchmail problem
On Fri, Sep 15, 2000 at 02:14:49PM -0400, John Ackermann wrote:
> In message <[🔎] 20000914194158.A1952@digibel.org>, staf wagemakers writes:
>
> >You could add the next line to your /etc/mail/sendmail.mc
> >
> >FEATURE(accept_unresolvable_domains)
>
> I regularly see "domain must resolve" messages in my logs, usually from
> random sites Out There. Is there a significant security/spam risk in
> accepting unresolvable domains? I have the antispam stuff (no relaying,
> etc.) turned on in my sendmail.mc already.
Normally you don't want to accept mail from non-valid domains, all from
addresses should have a valid internet address. I don't think your mailserver
get a open relay by enabling this "feature" but I wouldn't use it on a
mailserver that is connected to the internet.
You can't reply to message because it comes from a non-existing domain, so
why would you waste time to read it :)
--
Staf Wagemakers
email : staf@digibel.org
homepage : http://www.digibel.org/~staf
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