email hijacked?

[excusemebut]

Whenever I want to compose an email, and click on the "from" dropdown box there is an unknown Verizon email user account to choose from.  For example;  To compose an email from the dropdown my email address {edited for privacy} is shown, but there is also {edited for privacy} to choose from.  I didn't setup res19t0y as an account.  This is the case with my main account and all four of my sub-accounts, and each of those are different.  Is this something Verizon does, or has my email account been compromised?      

[somegirl]

Verizon assigns a "vzid" to every account when it is created. This begins with res_____ or vze_____ and is completely normal.