On 2003-12-19 13:11:11 -0800, Ask Bj�rn Hansen wrote: > > On Dec 19, 2003, at 12:38 PM, Roger Walker wrote: > > > Why must the config/require_resolvable_fromhost be set with a > >value? > > That's not right, maybe you are confusing it with the > count_unrecognized_commands plugin.
No, he doesn't. At least in 0.26, require_resolvable_fromhost checks
whether $self->qp->config("require_resolvable_fromhost") is true.
> >that if an MX or IP is localhost or private (i.e. 10.0.0.1), that the
> >connection should be dropped with a 5xx error;
>
> Why?
Suppose a spammer registers a domain spammers-r.us, adds these DNS
records:
spammers-r.us MX 10 mail.spammers-r.us
mail.spammers-r.us A 127.0.0.1
and sends mails with a sender <[EMAIL PROTECTED]>. You obviously
cannot send mail to <[EMAIL PROTECTED]>, but the
require_resolvable_fromhost plugin doesn't realize that 127.0.0.1 is
just as bad as no A record at all.
But I don't think this is usual spammer's behaviour. Normally they use
somebody else's domain not their own with a bogus IP address.
hp
--
_ | Peter J. Holzer | In this vale
|_|_) | Sysadmin WSR | Of toil and sin
| | | [EMAIL PROTECTED] | Your head grows bald
__/ | http://www.hjp.at/ | But not your chin. -- Burma Shave
pgp00000.pgp
Description: PGP signature
