[Postfix-BR] Squirrelmail - Arquivos estranhos no diretorio attach

[Marcio]

Boa Tarde Pessoal,

Em meu diretorio /var/spool/squirrelmail/attach ficam os arquivos de 
usuarios ( .pref, .abook, .cal), entretanto esta também cheio de arquivos 
como esses:

-rw-r--r-- 1 www-data www-data    4028 2008-05-14 15:05 
wIlOM6qX9Fr8zKyAzmeOiygg9IBQ4VJZ
-rw-r--r-- 1 www-data www-data    3156 2008-05-14 15:05 
74OBdClrXWM0OWaTYbz3a2r21EWdEVlZ
-rw-r--r-- 1 www-data www-data   44032 2008-05-14 15:08 
XoUqDbkhqBO5rpajsh12qx1qGzS1by4D
-rw-r--r-- 1 www-data www-data  159744 2008-05-14 15:08 
kR9pIfiT5Aib7WS1qTBzgfre3TrX4K93
-rw-r--r-- 1 www-data www-data  589312 2008-05-14 15:08 
hY7JEU25VbD1XqoAHKeJm7bMEeC6DsCF
-rw-r--r-- 1 www-data www-data   54272 2008-05-14 15:08 
glUiihSX7di0znpOP40HSjhjmOwPdAX4
-rw-r--r-- 1 www-data www-data  371200 2008-05-14 15:08 
9rKhhhRG0BB4wQjuSy2v3Cd5ncfHDie9
-rw-r--r-- 1 www-data www-data  104960 2008-05-14 15:08 
36zAfB6c7Ns0YYA5jcghVRfiSPT8yxTu
-rw-r--r-- 1 www-data www-data  557056 2008-05-14 15:08 
b0mw0orTsy3Qpiw7BqwJOtiSY76tCOeH
-rw-r--r-- 1 www-data www-data  102400 2008-05-14 15:08 
9jnQzFSzA7n5pef6wtLWKmoXLF9hS3KF
-rw-r--r-- 1 www-data www-data   35133 2008-05-14 15:12 
rxBHvW1Hi2q7GBR2DxQP3T92qEJeUV0q
-rw-r--r-- 1 www-data www-data     760 2008-05-14 15:12 
qxfsbsmHEvzE3MyADcnG1OoN06Ch9nEX
-rw-r--r-- 1 www-data www-data    4128 2008-05-14 15:12 
lIJ5qCjCkz6m9N57dovyvmTgrWZ1ymiV
-rw-r--r-- 1 www-data www-data   33247 2008-05-14 15:12 
a10j2vDQSXbmVJDPkZlio1eWJlqzK6GZ
-rw-r--r-- 1 www-data www-data     760 2008-05-14 15:15 
UJxjfad2Fc9nIk8PUMopH509B4oiEjMu
-rw-r--r-- 1 www-data www-data   33247 2008-05-14 15:15 
olbvG7WuSXbWpdVAKR8EyF7ARKilErhd
-rw-r--r-- 1 www-data www-data   35133 2008-05-14 15:15 
JzTChI6MJ3xBJOGQllmyEx6iRF3uOzjW
-rw-r--r-- 1 www-data www-data    4128 2008-05-14 15:15 
EVRxweGvwdVtvgw4pbvBVVpWX3y3TNSy

Trata-se de arquivos temporarios? Posso deletar tranquilamente?

Agradeço antecipadamente por qq colaboração.

Marcio