ISS Information Systems & Services - mail attachments
Modern viruses spread in this way. Generally a user will receive a mail with an executable attachment. This may appear to come from someone unknown to you. However, it may appear to come from someone that you know and trust. Once you click on the attachment the virus will infect your computer and others. Do not click on any attachment you were not expecting to receive.
DCU currently block this list of dangerous attachments
.ade .adp .asd .bas .bat .cab .chm .cmd .com .cpl .crt .dbx .dll .exe .emf .hlp .hta .inf .ins .isp .lnk .js .jse .lnk .ocx .mde .mdt .mdw .msc .msi .msp .mst .nws .ops .pcd .pif .prf .rar .reg .scf .scr .sct .shb .shm .shs .swf .uue .vb .vbe .vbs .vbx .vcd .vxd .wab .wsc .wsf .wsh .zip
How to mail an executable attachment to a DCU mail account
e.g. You wish to mail file.exe to a DCU account. Simply rename the file to file.exe.DCU before attaching it to your mail. In your mail inform the recipient to reverse the process when they receive the mail. The recipient should save the file and then rename it from file.exe.DCU to the original name file.exe
Our policy (pre Jan 2004) was to allow zip files through the mail server. However, this loophole has been exploited by a number of viruses. Most recently the Mydoom virus mailed .zip attachments which infected machines. We now reject zip files. This policy will be reviewed periodically.
How to mail a zip file to a DCU account
The process is exactly as above. e.g. To mail file2.zip - rename it to file2.zip.DCU before attaching it to your mail. The recipient should then save the attachment and change the name back to the original file2.zip