Baie e-posstelsels voeg 'n kop 'Apparently-To' (klaarblyklik aan) by boodskappe wat net BCC-ontvangers het. As hierdie kop bygevoeg word, sal al die ontvangers in elk geval vertoon. Om dit te voorkom, voeg ten minste een Aan- of CC-ontvanger.
Many email systems add an Apparently-To header to messages that only have BCC recipients. This header, if added, will list all of your recipients to your message anyway. To avoid this, you should add at least one To: or CC: recipient.