Alibaba Mail will filter emails with executable suffixes such as ". exe" for attachments. If attachments contain viruses, they will be discarded.
The following are possible types of executable viruses (specific format subject to system updates, not synchronized in real-time here):
".IMG",
".cab",
".vbs",
".ISO",
".img",
".exe",
".bat",
".msi",
".lnk" and so on.