How to?
 

When I click on an email hot link, how do it get it to direct to Gmail vs Yahoo?

hit alt + f4 as you click the link

This question does not parse.

Are you saying someone has posted a link to their email address (mailto:johndoe@thecellar.org) and when you click on it it opens an email to them in Yahoo's email application? It sounds like Yahoo is your default email application. I think this article covers how to change that.

The link is what I needed. Sorry for the poor question structure. Thanks Flint.