Geolocation iRule email alerts

There is a way to do this without extending your iRule, namely generating custom events that lead to email being sent.

Here's the solution explaining how to setup custom events: http://support.f5.com/kb/en-us/solutions/public/3000/600/sol3667.html

Here's the solution explaining how to setup local email resources: http://support.f5.com/kb/en-us/solutions/public/13000/100/sol13180.html

If you are determined to use the iRule, then I suggest looking into sideband connections and how to format SMTP messages.