Problem:

If a URL is not enclosed in angle brackets, some email clients only make part of the URL clickable. For
example, in OS X's Mail program, if your email body includes the string http://foo-bar/quax, only
"http://foo" will be clickable.

Solution:

As detailed in early email RFCs (see http://emperor.tidbits.com/TidBITS/Talk/724/), putting all URIs in
angle brackets fixes this problem. So on a Mac, sending <http://foo-bar/quax> will make the entire
URL http://foo-bar/quax clickable.

Thanks!