spam in an inbox.

[Eduardo Viruena Silva]

Hello, FreeBSD gurus!

I have a system that uses procmail & spamassassing to filter spam, but
there is an old account of a friend of mine that had not activated
its filter and received a lot of spam messages.

Now, we have his inbox and about 9000 messages which are spam and
messages he wants to read.

Is it possible now to filter the already received messages and
discard the spam from them?

How can I do that?

Of course, I can make a program that decides where each message starts and
where it ends, save it in a file and then filter it with spamassassin and
with the filtered file use grep to find "X-Spam-flag: YES to discard this
message.

I think it is too complicated... Is there an easier solution?

Thanks in advance.