Re: Spam sent from compromised (web)hosts vs botnet spam

On 13-03-20 05:31 PM, Martijn Grooten wrote:
>> You might want to follow one Received header, which could find webhosts
>> using a shared outbound mail relay.
> 
> Good idea - thanks.

You'll see very little of that from the *ix webhost spam engines.  They
do direct-to-MX.  Relatively few webhosters actively intercept port 25
outbound - I only know of one actually.

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