I received a phishing email with malware in the attachment.
The structure of the email made it more than obvious. So I tried to download the attachment (.zip). On attempting to download, it got blocked with a notice saying the attachment was infected and couldn't be downloaded.
Seznam.cz, in cooperation with ESET, has apparently started scanning downloadable attachments and is now protecting users from downloading dangerous files.
Which is another step towards better webmail security. Users of email clients still have to rely on AV protection on their computer/mobile device and common sense. P.S. For reference, the file was TrojanDownloader.Small.PSD