[fetchmail] delete spam

I upgraded to fetchmail-6.1.1.

Now I can silenty delete spam mail from my pop3-mailbox
by using -Z 553 and having my sendmail-accesstable
returning 553 as an error.

I works but it is not a straightforward solution.

How about 

        set bounce err[,err,err,..] header-only
        set bounce err[,err,err,..] header-and-message
        set delete err[,err,err,..]

?

Btw. I could not include antispam in .fetchmailrc.
Neither antispam nor set antispam works.

--
Klaus