If you're not sure which email software—and which version—you're using, look at the following images and identify your program. Then, when you're using the program, click the Help menu at the top and choose the About option.

Macintosh Mail
 
 
Microsoft Outlook
 
 
Microsoft Windows Mail
 
 
Outlook Express
 
 
Thunderbird
 
 
Windows Live Mail
 
 

 

 

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