I think we've finally reached the point where more spam comes from
Office 365 customers than legitimate and desirable email. Here's just
ONE spam campaign from Office 365 we pulled logs for today:
https://mxbin.io/piaQqm
Notice the different subdomains they send from:
*@csw11.besmartforgoodlife.com
*@csw12.besmartforgoodlife.com
*@csw13.besmartforgoodlife.com
*@csw14.besmartforgoodlife.com
*@csw15.besmartforgoodlife.com
*@csw16.besmartforgoodlife.com
*@csw17.besmartforgoodlife.com
*@csw18.besmartforgoodlife.com
*@csw19.besmartforgoodlife.com
*@csw20.besmartforgoodlife.com
*@csw21.besmartforgoodlife.com
*@csw22.besmartforgoodlife.com
*@csw23.besmartforgoodlife.com
*@csw24.besmartforgoodlife.com
*@csw25.besmartforgoodlife.com
*@csw26.besmartforgoodlife.com
*@csw27.besmartforgoodlife.com
*@csw28.besmartforgoodlife.com
*@csw29.besmartforgoodlife.com
*@csw30.besmartforgoodlife.com
*@csw31.besmartforgoodlife.com
*@csw36.besmartforgoodlife.com
*@csw37.besmartforgoodlife.com
And that's just one campaign, for just one day. At this point, we've
blacklisted Microsoft IP ranges and we now consider email from them to
more likely be spam than ham. Our blacklist isn't an outright block, but
if Microsoft can't get their act together maybe a block is what we all
need to do collectively. This is worse than the last few years of Gmail
SEO spam.
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