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Home > Archive > Debian Developers > December 2007 > Re: Bug#457318: ITP: qmail -- a secure, reliable, efficient, simple message transfer
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Re: Bug#457318: ITP: qmail -- a secure, reliable, efficient, simple message transfer
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| Russ Allbery 2007-12-24, 7:20 pm |
| Kalle Kivimaa <killer@debian.org> writes:
> Turbo Fredriksson <turbo@debian.org> writes:
qmail-smtpd in djb's stock distribution with no patches is not capable of
being configured to prevent reflected spam. I'll take various people's
word that the patch sets fix this.
[vbcol=seagreen]
> How can you configure the QMail to send error messages only to
> non-forged sender addresses? I don't see any way of differentiating
> these, so the only way to do it is during the SMTP session.
You verify the sender address during the SMTP session and don't accept the
mail if it's not for a valid local address. This requires keeping some
sort of database or other information that qmail-smtpd can query to use to
reject unknown addresses immediately.
--
Russ Allbery (rra@debian.org) <http://www.eyrie.org/~eagle/>
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