Re: Problems Backscatter

2 msg	postfix + gmail + multiusers
2 msg	strange question regarding lmtp
3 msg	Updated amavisd-new; can't send/receive mail
8 msg	RPM 'n stuff
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5 msg	postfix + courier + active directory 2003
12 msg	Fail to test postfix
2 msg	Global groups
7 msg	About creating database
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Problems Backscatter
\ Vida Luz Arista (14 Jun 2007)
. \ mouss (14 Jun 2007)

5 msg	question about receive_override_options
4 msg	specific whitelisting
3 msg	Real unknown host ???
2 msg	Another question about logs...
4 msg	fallback_relay not getting used
3 msg	Maildir
6 msg	Outgoing Mail Copy
1 msg	Close to getting SASL and SMTP AUTH on OS X wor...

Subject:	Re: Problems Backscatter
Group:	Postfix-users
From:	mouss
Date:	14 Jun 2007

Vida Luz Arista wrote:
> Hi All,
>
> I have problems in my postfix, I have backscatter, in a period of 3
> minutes Ihave 3000 messages with destiny to AOL o bellsouth.net.
>
> My server accept mail of use rof my network this server is an relay
> for my networks

you either need to set relay_recipient_maps or make sure the final
server really validates recipients. otherwise your
reject_unverified_recipient is useless. from the postfix machine, try
telnet'ing to the final server and using an invalid recipient:

# telnet internal.mta.example 25
...
EHLO yourheloname
...
MAIL FROM:<foo>
...
RCPT TO:<doesnotexist>
...
QUIT

after the RCPT TO command, the server should return an error and not
accept the recipient.