Re: [exim] No Return Path

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Lähettäjä: Jonathan Gilpin
Päiväys:  
Vastaanottaja: Brett Parker
Kopio: exim-users@exim.org
Aihe: Re: [exim] No Return Path
OK that makes sense... I thought there might be a reason... problem is
that due to the following router:

spamcheck_director:
   driver = manualroute
   domains = ${lookup mysql {MYSQL_Q_SPAMC}{$value}}
   senders = ! ${lookup mysql {MYSQL_Q_WHITELIST}{$value}}
   condition = ${if and { \
     {!eq {$received_protocol}{spam-scanned}} \
     {!eq {$received_protocol}{local}} \
     } {1}{0}}
   headers_remove = X-Spam-Flag
   route_list = "* localhost byname"
   transport = spamcheck
   verify = false


Any messages which have a MAIL FROM of <> are not being passed through
spamassasin..

Can anyone help me ensure that spammers can't bypass spamassassin by
avoiding providing a MAIL FROM ?

Jonathan

On 9 Sep 2009, at 14:00, Brett Parker wrote:

> On 09 Sep 11:01, Jonathan Gilpin wrote:
>>
>> On an exim server:
>>
>> Sending:
>>
>> MAIL FROM: <>
>> 250 OK
>>
>> Surely I need to prevent this from being allowed? How can I make Exim
>> reject a message if MAIL FROM: is blank?
>
> No, MAIL FROM being NULL is perfectly within the specification, and is
> how bounces will be sent...
>
> Rejecting them would mean that you never get any bounce messages,
> which
> could be a bonus, but probably isn't.
>
> --
> Brett Parker
>
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