How to separate attachment from a mail message

[GSRRGS]

Hi,

I am using qmail-1.03 with qmail-scanner+spamassassin+Clam AV. For proper learning of spamassassin, I am planning to give spam and ham messages to spamassassin even though it is configured for auto learning. For this process I'll get spam and ham messages from my users as attachment and then I will separate that attachment from the forwarded message and feed it to sa-learn command. For this purpose I need a script that will separate the attachment and save it to a file.

I don't know if it is the right place to post this question. Please show me the right direction.

Thanks
Rakhra