As you may remember in the last episode, I was looking for a way to
create a spamtrap by salting false addresses for web harvesters,
then rejecting out of hand any message that contained the false recipient.
This is what I did:
In acl_check_rcpt: (acl_smtp_rcpt)
accept domains = +local_domains
recipients = /opt/exim/spamtrap
set acl_m0 = "SpamTrap"
... rest of content
in acl_check_content: (acl_smtp_data)
acl_check_content:
deny message = "Addressed to non-existent recipient"
condition = ${if match \
{$acl_m0} \
{"SpamTrap"} \
{1}{0}}
... rest of content.
This works.
However I would like to do something less severe than denying it.
Say, perhaps save a copy of it to a file, so that I can check through it and see if it
is doing what I think it is.
I haven't been able to configure a router to deal with a message. Routers, by their nature
seem to deal with addresses.
So, for example, this router does not do what I want:
spamtrap_router:
driver = accept
domains = +local_domains
condition = { match {$acl_m0}{"SpamTrap"}}
transport = spamtrap_transport
If this is called with exim -bv spienko@???,sbotsford@??? it is run separately
for each address. This puts one copy on the spamtrap_transport for every receiving user.
How do I perform an action just once for a message, as opposed to doing it once for each recipient?
At present the only option that occurs to me is adding a header in the rcpt acl, then testing for this
header in a system filter. This is clunky. (It also means I have to upgrade. Compile is in progress.)
--
Sherwood Botsford
St. John's School of Alberta
