On Amazon Mail Converter's Privacy Page you can request and collect all the privacy and GDPR related information that Amazon Mail Converter is providing.
The privacy policy by is a legal document or statement that discloses how Amazon Mail Converter gathers, uses, discloses, and manges their customers' data.
The basis for 21.1 sharing, adding, uploading, hosting, accessing or sending personal data out of Europe. Vendors can also add a description of their own impact assessment for data transfers.