Re: Isn't spam a ISP issue?

On 13-03-18 04:03 AM, Kurt M wrote:

>> You are assuming that legitimate bulk mail is the biggest issue here
>> and not the various examples of; user accounts with stolen credentials
>> (ex: Ongoing Y! issues), the recent uptick in spam from compromised
>> web hosts, bots, malware, ISPs that don't/wont enforce AUPs, ISPs that
>> don't know any better (emerging markets).
> 
> Not at all, they are maybe 1-2%, but as I said, what I still can see, using an
> ISP mailer seems still to be the most common way to spam, not setting up your
> own MTA.

Er no.  At present approximately 50% of all spam comes from compromised
*ix web servers using direct-to-MX PHP and perl SMTP spamming tools.

Most of the rest is direct-to-MX Windows trojans (festi, kelihos,
cutwail et. al.).

Using an ISP MTA for spam hasn't been common for the a decade or so.