disconnect verizon.net email from yahoo


Can anyone tell me how I can disconnect my verizon.net email address from Yahoo mail?

The reason I want to do this is I am about to cancel the DSL account that my verizon.net email address is associated with.  Before I do this, I want to use the utility at keepmyemail.com so I can keep my verizon.net email address even after I cancel my DSL account. 

The utility at keepmyemail.com tells me that in order to use this utility, I first have to disconnect my verizon.net email from yahoo mail, but it doesn't give any instructions as to how to do this.

Any help will be greatly appreciated.

Thanks in advance,