Some attachments, potentially harmful, are still blocked from our Mail Server. Each time a message is received, as an attachment containing a file type in the following table, the message is deleted and the sender is sent a notification message to alert them of the block and invite them to review our security policies in order to be able to resend the message successfully. To send a file or files that fall within the list of blocked file, simply rename them or compress them in ZIP or RAR format.