It's possible that certain email accounts utilizing email services with easily guessable passwords were compromised, leading to abuse of the ". onmicrosoft.com" subdomain for sending spam via email.
I've observed an increase in the blocking of IPs belonging to Microsoft Corporation by the SpamCop blacklist since November 2023, with a notable spike in activity during February and March 2024. Jimmy On Tue, Mar 19, 2024 at 12:10 AM Jared Hall via users < users@spamassassin.apache.org> wrote: > I've several customers whose accounts were used to send spam as a result > of Microsoft's infrastructure breech. > > Curiously, NOBODY has received any breach notifications from Microsoft, > despite personal information being compromised. > > What has anyone else experienced? > > Thanks, > > -- Jared Hall > >
