On Dec 17, 2006, at 2:11 PM, Jorge Bastos wrote:
Hi,
Aaron/Paul and other developers,
Before read this, i'm not asking nothing, this is just something
that came to my mind.
How about to have a antivirus integration in dbmail-lmtpd ?
something like make the email get scanned by a shell script that
executes clamav or other.
This could make DBmail even ore rich than it is right now.
Maybe in a 2.5x series, what do you think?
:P
Jorge
_______________________________________________
DBmail mailing list
[email protected]
https://mailman.fastxs.nl/mailman/listinfo/dbmail
I appreciate the idea. But I think there are enough means to do this
already that we might reconsider the necessity.
procmail and maildrop can do this.
postfix content_filter can do this.
As another consideration I found the following information useful but
I can't recall where I found it. It's fairly obvious...
When you consider the email received that people don't want...
Most of it is spam.
Some of it is a virus.
Spam is easier to filter out (lower CPU/IO consumption) and can often
capture a virus at the same time.
(This is especially true with postfix UCE controls and I'll assume
sendmail Milter can do similar).
A virus is much harder to filter for and is very expensive in terms
of CPU/IO.
It makes sense to do the spam filteriing first and then filter for
virii.
This would support the idea of making clamav available as a lmtp plug
in.
However I'm doing something like this and am seeing some interesting
side effects that I would like to share.
I have a set-up of postfix -> dspam (LMTP) -> dbmail (LMTP) so I have
two LMTP applications chained together.
This works great.... except....
If the delivery takes a long time postfix will timeout and attempt a
redelivery.
Sometimes this has inconsistent results....
I suspect LMTP was designed to be something that was relatively fast
(highly subjective).
If you start putting anti-virus utilities here you might violate that
assumption and cause inconsistent problems.
Would it make more sense to have a tool that would manage a queue of
emails and sequentially process chained spam filters and chained anti-
virus tools before attempting delivery (back into postfix via
content_filter) or LMTP?
_______________________________________________
DBmail mailing list
[email protected]
https://mailman.fastxs.nl/mailman/listinfo/dbmail
