avamvisd mysql table too big...

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Hi, I realize that amavisd db is too big...
It's possible to empty quarantine table at least?
And how?

Thanks, this is the DB dimensions:

[root@mail ~]# du -hs /var/lib/mysql/amavisd/*
4,0K    /var/lib/mysql/amavisd/db.opt
12K    /var/lib/mysql/amavisd/maddr.frm
137M    /var/lib/mysql/amavisd/maddr.ibd
12K    /var/lib/mysql/amavisd/mailaddr.frm
0    /var/lib/mysql/amavisd/mailaddr.MYD
4,0K    /var/lib/mysql/amavisd/mailaddr.MYI
12K    /var/lib/mysql/amavisd/msgrcpt.frm
421M    /var/lib/mysql/amavisd/msgrcpt.ibd
16K    /var/lib/mysql/amavisd/msgs.frm
985M    /var/lib/mysql/amavisd/msgs.ibd
16K    /var/lib/mysql/amavisd/policy.frm
0    /var/lib/mysql/amavisd/policy.MYD
4,0K    /var/lib/mysql/amavisd/policy.MYI
12K    /var/lib/mysql/amavisd/quarantine.frm
6,7G    /var/lib/mysql/amavisd/quarantine.ibd
12K    /var/lib/mysql/amavisd/users.frm
0    /var/lib/mysql/amavisd/users.MYD
4,0K    /var/lib/mysql/amavisd/users.MYI
12K    /var/lib/mysql/amavisd/wblist.frm
0    /var/lib/mysql/amavisd/wblist.MYD
4,0K    /var/lib/mysql/amavisd/wblist.MYI