Lê Ngọc Hiếu wrote:
Hi,
I setup my mail server with two instance of postfix to listen on port
25 for incomming mail, and port 11234 for outgoing mail. Only mail
coming through port 25 are filtered by SA. But now I have too many
spam from my server, they have bot to auto connect to our server and
sending mail to me.
I want SA to auto delete mail from my domain test.com
<http://test.com>. So I just write a new rule:
header LOCAL_DEMONSTRATION_FROM From =~ /test\.com/i
score LOCAL_DEMONSTRATION_FROM 100
I marked it 100 point and intend to get SA auto delete them but I just
get the instruction to auto delete by using procmail. I integrated SA
to postfix by adding:
smtp inet n - n - - smtpd -o content_filter=spamassassin
to /etc/postfix/main.cf <http://main.cf>. How could I setup for auto
deleting in this case? (SA's running normally and detect spam well)
Or any solution for this?
Well, I'm no postfix expert by any stretch, however I can tell you it's
impossible for SpamAssassin to directly delete mail. It can't, because
it has no control over the envelope. If SA were to try, most MTAs will
simply assume SA crashed and recover the original message without even
any markings from SA. The simplicity of the mail filter interface that
SA works with has the advantage of letting it be used lots of places,
but you loose the ability to do things like delete mail in SA.
So, you really need to look at another tool in your mail chain to
perform the deletion. This could be done at the postfix level, or at
the MDA level (ie: procmail).
With postfix, personally I'd suggest using something like amavis as an
integration, and do your scanning before queuing so you can safely 550
messages (assuming you're running SA on your MX server, instead of an
inside server that gets mail forwarded to it). It's more complicated to
set up, but you'll be able to set up AV scanning this way too.
http://wiki.apache.org/spamassassin/IntegratedInPostfixWithAmavis
If that's too complex, you should look at writing a simple filter script
that can return status codes that will cause postfix to discard the
message (and switch to the spamd/spamc pair, instead of the spamassassin
script, which is really not intended for use under any kind of serious load)
http://wiki.apache.org/spamassassin/IntegratedSpamdInPostfix
Thanks for your help.
