Mike Black wrote:
MB> I've just installed spamassassin with sendmail-8.12.3 and spamass-milter-0.1.1 and
large attachments are blocking (they actually end up sending the attachment on every
attempt by the client -- but the client (both Outlook Express and Outlook) timeout and
spamass-milter processes keep building up.
Mike, I don't understand what you mean by "large attachments are blocking", or
by the stuff in parentheses. Could you clarify if I don't answer below?
MB> I get a log message that says:
MB> spamd[11501]: skipped large message in 4 seconds.
spamc will abort processing of large messages (default is >250k) to stop spamd
from getting swamped by processing enormous attachments, which are very rare in
spam. I imagine that the spamass-milter is either invoking spamc or doing the
same size-checking.
MB> This is apparently coming from spamd:
MB> if (/SKIP SPAMC\/(.*)/)
MB> {
MB> logmsg "skipped large message in ".
MB> sprintf("%3d", time - $start) ." seconds.\n";
MB> return 0;
MB>
MB> }
MB>
MB> Anybody know how to fix this?
It's not a bug, it's very definitely a feature. You can increase the size limit
if you want by using the "-s" flag to spamc -- if you look at the milter code
you'll probably see there how to set the limit.
MB> And...what do I have to do when I want to start actually blocking these emails
instead of lettting them pass thru?
It's almost certainly best not to do this in SpamAssassin. Large attachments
will bog down the system, since some of the patterns used for checking messages
start taking a very long time to process when scanning thousands of lines of
base64 or uuencoded text. I don't know why you'd want to block large incoming
messages anyway -- odds are extremely good that they're nonspam. And disk space
is so cheap these days :)
C
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