Hi
I am working on such a system at the moment I am using exim and exiscan.
Because mail could be to multiple addresses you handle on your machine it
is difficult to check recipients as mail arrives, so I am going to check
who the mail is sent by $sender_address and if one of my customers requires
mail from this address I pass the mail with a spam score, if it turns out
to be for a different customer (or for more than I where not all customers
want it) and the spam score is above the fresh hold I intend to generate
the appropriate bounce message.
Yes I am having to accept some mail that I latter bounce but am managing to
bounce most mail that I don't want with a 5xx
Hope this helps
David
At 12:45 05/02/2003 +0000, Ollie Cook wrote:
>Hi,
>
>I'm delevoping a content scanner (spam and antivirus), where each individual
>recipient at our site may have different settings for
>accepting/rejecting/marking mails that match, using Exim's local_scan()
>function but am having trouble decided how to treat messages with multiple
>recipients.
>
>For example, if recipient A has spam rejection enabled and recipient B
>does not
>I will need to accept the message and deliver it to B only (by
>manipulating the
>recipients vector), but also generate a bounce message for the sender,
>announcing that recipient A did not receive the message. (The bounce will
>probably go nowhere, but we have to have tried, in case the 'spam' was in fact
>legitimate.)
>
>Since I would not be able to give a 5xx permanent fail (which would suggest
>both recipients failed), I would have to accept the mail with 2xx and then
>subsequently generate a bounce message.
>
>I'd rather be able to reject messages based on content at SMTP time, so it's
>the remote site's responsibility to handle bounces (given that the majority of
>spam bounces will just sit on my queue for a while), but I suspect that's not
>possible.
>
>I was really just wondering (after all that), if this is what other people do
>in this situation, or if other schemes have been devised?
>
>Thanks,
>
>Ollie
>
>--
>Oliver Cook Systems Administrator, Claranet UK
>ollie@??? 020 7903 3000
>
>--
>
>## List details at http://www.exim.org/mailman/listinfo/exim-users Exim
>details at http://www.exim.org/ ##
David J Dean
Net-Work Internet Ltd.
Email: d@??? http://www.net-work.net ICQ: 502311
tel: +44 1824 708780
