Blackberry Q10 "email" Questions

i have email taging on my own email how do i get rid of it on my q10 when i go to send a email to a email address now there is another email address tagging so message is going to wrong address Your ...

...not complete to continue to start it up. I received a CCR Warranty card about return. I have sent email for form just now. What can I expect with this return policy and how long before a get