Re: Port 25 filters - how many here deploy them bidirectionally?
From: Bob Martin
Date: Tue Jan 25 14:35:06 2005
After this post, we did some real digging.
The timing of the ever lower levels of spew from our dial up pool
coincides with the blocking of the MS NetBios ports, and the
implementation of full outbound email scanning (both AV and spam). By
full scanning, I mean we treat all email as untrusted, regardles of
where it originates.
We've evidently made it harder to turn the boxen into zombies, and time
and entropy have started to clean up the ones that where there.
Bob Martin wrote:
We really don't know what to make of it.
Either the spammers have modified their code so that they don't waste
their time trying to spew from blocked machines, or we've been very
lucky of late.
I hope it's the former, but suspect it's the latter.
Subhi S Hashwa wrote:
Sunday, January 9, 2005, 4:17:27 PM, Bob Martin wrote:
This may or may not be related, but we have seen a sharp decline in spam
attempts from our dial up pool since Sept 2004.
Intersting. with the spam on the increase, do you think spammers are
'ignoring' your customer base? or is there other factors involved ?