WLM-Emails switching from AT&T to Comcast internet

Will i lose my current and old AT&T emails in Windows Live Mail when i switch from AT&T internet to Comcast internet? I understand i can no longer use the ATT email address, but will I LOSE all my emails in my inbox, sent box, draft box etc........? Shuttlecloud was "fairly" sure I would not lose the info and Comcast did not know. I want to keep my current/past emails that i received with ATT. I want my same folder and such to STAY on my WLM so i can access past emails. I understand that the emails will stay on my hard drive--just want to be positive that they will still appear on WLM page so i can access them, ALONG with my new Comcast emails. Please advise. Thank you.

Thank you. I actually went ahead and set up my new comcast emails IN WLM below my ATT email boxes. Then I dragged each inbox and other folders to make the same folders under my comcast email folders. So now the ATT emails are within the comcast email boxes/folders. So hopefully that takes care of it. Thanks for the assurance that those emails will not disappear.