Many emails are sent with “header” metadata to indicate that they are from list-based automated tools. { -brand-name-firefox-relay } detects this header data so it can block these emails.
Mae llawer o e-byst yn cael eu hanfon gyda “phennyn” metadata i nodi eu bod yn dod o offer awtomataidd ar sail rhestr. Mae { -brand-name-firefox-relay } yn canfod y data pennyn hwn er mwyn rhwystro'r e-byst hyn.