Heavy increase in spam influx this week?

Gareth list-mailscanner at linguaphone.com
Fri Aug 31 19:35:57 IST 2007

cat /var/log/maillog | grep -E "(connection count|concurrency)"
Looking through my logs there have been the odd one or two IP addresses in
the past with about 10 active connections at once but starting from the 27th
I started to see connection of over 20 concurrent.

I have dropped the concurrent connections per IP from 50 down to 5. We only
have a 1Mbps internet connection so if any genuine person tries to send us
more than that at the same time I would prefer to limit it to conserve
bandwidth anyway.

I think I'll do what you did and reduce the smptd_timeout aswell.

> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info
> [mailto:mailscanner-bounces at lists.mailscanner.info]On Behalf Of Leland
> J. Steinke
> Sent: 31 August 2007 18:55
> To: MailScanner discussion
> Subject: Re: Heavy increase in spam influx this week?
> Kai Schaetzl wrote:
> > My Postfix machines still suffer from the backlog of bots, as I
> haven't checked yet
> > if Postfix provides similar time-out options. Anyone knows?
> smtpd_timeout?
> I started reducing this from 300s to 120s several moments ago, after
> catching up on my email after a particularly long meeting discussing,
> among other things, requirements for new spam/virus filtering servers...
> Leland
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