[AMaViS-user] How to use sa-learn to manually train?

[SamW <sw...@sv...>]

Here is how I use the sa-learn to train the bayes filter in version SA 
2.63. I am using amavisd-new-p9 / sa 2.63 / sendmail

I asked our users to send a mail to sp...@my... if the users see a 
spam message. If they see a non spam (ham) message they send a mail to 
no...@my.... Note that the messages that the user receives is 
already tagged with X-Spam-* headers

I then run following 2 commands, to train the sa 4 times a day through a 
crontab.

	/usr/local/bin/sa-learn --spam --mbox /var/mail/spam
	/usr/local/bin/sa-learn --spam --mbox /var/mail/notspam

Then I also feed the same messages to razor
	/usr/local/bin/razor-report /var/mail/spm

sa-learning script seems to run, and learn. But here are my concerns,

Every mail is tagged, with x-spam-* headers that I feed to spam filter
Every mail which SPAM is also in most cases has its Subject Field changed. 
with ***SPAM**

My Questions

1. Should I remove spam headers and remove the ***SPAM*** from Subject 
field before I feed mail to sa-learn?
2. Should I remove Spam headers before I feed them to razor ?

IS THERE ANY BETTER WAY OR HOW-TO SOME WHERE I CAN START TO USE? How do you 
folks use sa-learn?

Thank you in advance.

- SamW