How do I stop Outlook blocking attachments sent to me?

[JB]

A friend is sending me urls from the internet for me to look at but Outlook
is blocking them. They are innocent pages of hotels etc as we are planning a
trip. Outlook shows the attachment in the inbox but Outlook blocks it as a
potentially unsafe attachment.

Help.

 

[neo [mvp outlook]]

See http://www.slipstick.com/outlook/esecup/getexe.htm for additional
information.