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On 8 Sep 99, at 10:52, Jan Stanik wrote:
> In Sendmail, I can define the feature "relay based on MX". Is it
> possible configure qmail to work similar way?
It is possible, I would think. It means you need to read the RCPT
TO: part, get the "remote host" part and check if you're and mx for
that host. A few lines in qmail-smtpd should solve that.
I would not consider this an option though: You have no control
whatsoever about individuals listing you as their backup MX. Very
simple DoS (overfilling the queue partition) are straightforward - I'll
list you as my secondary MX, shut down my primary MX and get
many e-mails sent to me (from many places). Your queue overfills.
Human control is desirable. It's not too difficult to put a line in
rcpthosts (or morercpthosts and rebuild).
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--
Petr Novotny, ANTEK CS
[EMAIL PROTECTED]
http://www.antek.cz
PGP key ID: 0x3BA9BC3F
-- Don't you know there ain't no devil there's just God when he's drunk.
[Tom Waits]
