A received message with a blocked attachment.
Does the message in the picture look familiar? It's a message about a blocked attachment. You may already be aware that not all types of attachment can be opened in Outlook. Because of their enormous potential to do harm, Outlook now blocks certain file types automatically. Examples of blocked file types include executable files (.exe, as shown in the picture), batch processing files (.bat), and active server page (.asp) files. We've included a complete list in the Quick Reference Card at the end of this course.
This blocking helps protect your computer from viruses and cannot be changed. Although this enforced blocking makes file sharing less convenient, you should be aware that you can still use e-mail to share any file type with trusted friends and colleagues — you'll just need to take a few extra steps for the sake of enhanced security. If you receive a message with a blocked attachment, you'll need to ask the sender to re-send the message using one of the methods described in the next lesson of this course.