I have collected about 3000 hotmail accounts that are sending spams,the email first part is random letter,such as:

nesledojuub@hotmail.com
mcsladooglkox@hotmail.com
fsuspk@hotmail.com
saydoaezkpmnl@hotmail.com
zkpowrutwah@hotmail.com
ytlkwwsrhs@hotmail.com
orqjnkm@hotmail.com
sbxosildr@hotmail.com
dzqdvxjcb@hotmail.com
oarhfbsu@hotmail.com
theeteyjulvm@hotmail.com
zkpowrutwah@hotmail.com
mcsetheqfjf@hotmail.com
qnssiv@hotmail.com
salezeaitlwdo@hotmail.com
rupoizx@hotmail.com
glpfmai@hotmail.com
teddagisuplmp@hotmail.com
nycheighrpapm@hotmail.com
xnnepqndi@hotmail.com
sheditmgc@hotmail.com
simawynv@hotmail.com
ozqxjr@hotmail.com
fyllzrv@hotmail.com
fwetmbiv@hotmail.com
shathedwgcp@hotmail.com
lateshoaiwrgn@hotmail.com
sxdogqmj@hotmail.com
cempjj@hotmail.com
vswjdbyjebf@hotmail.com
teaunounqtib@hotmail.com