Why must your privacy policy mention prospecting?
GDPR requires total transparency about how you process personal data. If your sales team contacts businesses using data from public sources, that activity must be reflected in your privacy policy. Failing to do so is a breach of Art. 14 GDPR. The European Commission's digital privacy framework under the ePrivacy Directive adds further requirements for electronic communications.
Your policy must explain three things: what data you process (name, corporate email, business phone), where you get it from (public sources like Google Maps, corporate websites, business registries) and what legal basis you use (legitimate interest for B2B).
Additionally, every cold email or first contact must reference where the recipient can find your full privacy policy.