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Re: Port 25 filters - how many here deploy them bidirectionally?
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: