Anti-spam researcher Steve Linford recently tracked a massive spam attack against the mail servers of both Hotmail.com and MSN.com.
The attack, which has run continuously for the last five months, targeted Hotmail and MSN email accounts at the rate of three to four tries per second, 24 hours a day, hitting Hotmail's server more than 52 million times.
Unfortunately for users, spam delivered to their bulk mail folder counts toward
their mailbox quotas. Until Hotmail and MSN act to prevent such attacks, the
only way subscribers can protect themselves is to create a long user name with
plenty of random characters interspersed with digits.
For details, see "Hotmail: A Spammer's Paradise?" at http://www.wired.com/news/print/0,1294,57132,00.html