We will discontinue insecure FTP
Secure FTPS has been recommended by us for some time but is not currently mandatory everywhere. An upcoming update will change this. The insecure FTP will then stop working.
Instead of FTP, only FTPS and SFTP can be used (SFTP is only available for accounts with SSH access).
Avoid surprises and change the encryption type to Require implicit FTP over TLS now.
Want to learn more about the differences between FTP, FTPS and SFTP? Then click through to this article.