Red Flag - Attachments

ATTACHMENTS:

1. I see an attachment with a possibly dangerous file type. The only file type that is always safe to click on is a .TXT file. For example:
   1. Double extensions like - .TXT.EXE
   2. Most dangerous file extension - .EXE
   3. Others to watch for: .BAT, .HTML, .REG, .VBS, .ZIP, MSI
2. Does the file attachment type make sense for what the message indicates. Example: voicemail (mp3 or wav) but a .HTML is attached instead.
3. If you were not expecting an email with an attachment, or it is not the normal protocol for that sender, verify it directly with the sender before opening.
4. Does the attachment prompt you to login and provide credentials?