[bitfolk] spamd exclusion

Hello, Since I am both lazy and stupid:- Is there a way to exclude e-mails received from certain (external) senders from the spamd check? Am using the BitFolk spamd service from my Debian vps, and it works really fine with just one exception. Every time I get an e-mail from DPD about a scheduled delivery, it is marked as spam by the spamd service. And since I am not checking the spam account every day I don't see this until it is too late. Is the a prefered way to "whitelist" the e-mail sender yourdelivery(a)dpd.co.uk somewhow? So those emails are never sent to spamassasin and filtered out as spam? In /etc/mail/spamassassin/spamc.conf? Or /etc/postfix/master.cf? Or is the only method to change the shell script communicating with spamd: /usr/local/bin/spamchk.sh? That is a quick fix, but it is not a clean solution IMHO... Thanks, __ /ony