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Re: [Debian] [exim] Relaying-Probleme



On Mon, Jun 25, 2001 at 04:12:28PM +0200, Frank Fürst wrote:
[...]
> $ telnet mail-abuse.org
> >>> rcpt to: <nobody%mail-abuse.org@pc201-37.biochem.uni-potsdam.de>
[snip]
> System appeared to accept 1 relay attempts
> 
> Ich vermute mal, der "Spammer" erwartet, dass diese Mail an
> nobody@mail-abuse.org zugestellt wird. 

Ja.

> Wird Exim das tun,

Nein, du muesstes percent_hack_domains aktivieren und mail-abuse.org
in host_accept_relay aufnehmen. So wird exim feststellen, dass es
keinen User namens nobody%mail-abuse.org auf deinem System gibt und
bouncen.

> wie kann ich es verhindern?

Nicht noetig, wenn du willst, dass der Test durchlaeuft, musst du iirc
folgendes setzen:

# When this option is set, the addresses of recipients received from
# a remote host are verified as they are received, provided the
# sending host matches `receiver_verify_hosts', the incoming address
# matches `receiver_verify_addresses', and the sender address matches
# `receiver_verify_senders', if either of the last two are set. If an
# address is invalid, an incoming SMTP call gets an error response
# to the RCPT command. If an address cannot immediately be verified,
# a temporary error code is given. The receiver_try_verify option is
# less severe: it operates in the same way, except that an address
# is accepted if it cannot immediately be verified. Verification
# failures are logged.

receiver_verify = true

             cu andreas

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