7-zip.. opening of zipped up attachments from email with a .msg

A client called, received an attachment from her boss, 10 over megabytes! Nice thing is that it's all zipped-up, but there seems to be a slight issue of not being able to open some of the content of the attachments.

Content of zipped up file comprises of PDF, XLS, DOCs and... MSG!

Can't seem to open the attachment properly due to the nature of 7-zip, it seems to be able to strip open the .msg file into it's HTML or RTF form. 

As such, right-click and you'll see OPEN OUTSIDE function.. that's weird! There's such a thing...
Open-Outside function calls the default program to open .MSG file, and problem was resolved.

On a separate note, I believe we can open a JPG file and view them using Windows Photo Viewer from 7-zip too! we faced a bug in recent years where an image being opened from 7-zip will not be viewable when using the default Windows Photo Viewer... We used Picasa as a work-around...

Having said that, I do believe this method above - open-outside - will work-out!