postfix-2.2.10 strange problem

hi all,
i have configured a postfix avirus/aspam relay host amavisd-new, clamav,
spamassassin. this host filter all incaming mail on port 25 and forward
it to the real mailserver via ($forward_method = ...) in amavisd.conf
and local_recipient_maps = [void] in main.cf

this relay works perfectly for a few mounth but yesterday i have found a
strange message passed from. this is an example of the 2000 passwd and
sent to a blackberry user....

Oct 24 17:45:29 relayposta amavis[26916]: (26916-07) Passed CLEAN,
[85.37.16.21] <> -> <pulizia@ol.it>, Message-ID:
<syrYrZuvb00011a53@smtpout19.attiva.biz>, mail_id: m9amcfW9u7mc, Hits:
0.562, queued_as: 34BD51F6312, 2585 ms

my question is:
how can i block this type of mails ?
and,
is it right the local_recipient_maps = [void] if i want to forward all
mail to another host ?

thanks for your help
matteo

en 25/10/2006 07:36 teo ha escrito:

> is it right the local_recipient_maps = [void] if i want to forward all
> mail to another host ?

Is it really forwarding you want (to an e-mail account on another host)
or relaying all mail for a given domain to another host?

See:
http://www.postfix.org/postconf.5.html#relayhost
http://www.postfix.org/postconf.5.html#relay_domains
http://www.postfix.org/postconf.5.ht...recipient_maps
http://www.postfix.org/postconf.5.ht...relayhost_maps

Bas S.Th. Verdult ha scritto:
> en 25/10/2006 07:36 teo ha escrito:
>
>> is it right the local_recipient_maps = [void] if i want to forward all
>> mail to another host ?
>
> Is it really forwarding you want (to an e-mail account on another host)
> or relaying all mail for a given domain to another host?
>
> See:
> http://www.postfix.org/postconf.5.html#relayhost
> http://www.postfix.org/postconf.5.html#relay_domains
> http://www.postfix.org/postconf.5.ht...recipient_maps
> http://www.postfix.org/postconf.5.ht...relayhost_maps

it forward all mail domain from a host to the real mailserver

en 25/10/2006 07:36 teo ha escrito:
> is it right the local_recipient_maps = [void] if i want to forward all
> mail to another host ?

[void] means 'any address is valid'.
http://www.postfix.org/LOCAL_RECIPIENT_README.html

If you don't need "local", then it's even better to avoid it at once:

local_recipient_maps = hash:$dir/empty

Where empty is an empty hash file, and use virtual aliases and/or
transports for example to implement the few "local" tasks that you need.

For forwarding/relaying all mail to a another mailserver you don't need
"local".

en 26/10/2006 07:52 teo ha escrito:

> it forward all mail domain from a host to the real mailserver

Okay, postfix forwards «like an internal intermediate relayserver» all
maildomains to another mailserver that host the useraccounts (where the
users can obtain their mail.)

I assume that your current postfix setup doesn't know which recipients
are valid, regarding the logline you posted earlier (accepting mail for
a nonexistent domain pulizia@ol.it).

Roughly you probably want:

relayhost = [ipaddress_of_other_mail_server]
smtpd_recipient_restrictions =
permit_mynetworks
...
reject_unverified_recipient

http://www.postfix.org/ADDRESS_VERIFICATION_README.html