You can follow this procedure in order to create a Menu Item that will send an email to a friend with the URL to the current page!
In the <Link> property of the item add
mailto:&subject=Check%20this%20page%20out&body=<awm:theUrl>
Then, in the AllWebMenus project file, go to “Tools > Project Properties > Advanced Scripting”, and add in the text box
theUrl = document.location;
If you just want to send a specific page to someone (and not the current), then in the <Link> property of the item you should add
mailto:&subject=Check%20this%20page%20out&body=www.mywebsite.com