How do you change your e-mail server?

The server, Adelphia, went out of business, and i am now with Comcast. My new email address is listed as an alternate address already. It is very time-consuming to go to each yahoo group and change the email address. Is there a way to change all the...

when i opened my new account it asked for my server id and the server id i was sending my e-mail to. we have joint accounts with one headquarter and one recipient. how do i find our names with server id and how do i change them when they are entered...

Help please. I give up. The computer is telling my my email server POP3 is wrong. It originally only gave me 2 choices so obviously it is the other one. I am unable to find that page again even when I go in to my mail options. I can't reply to website...

just got this computer and i apparently set it up wrong..how do i get back to change it?

i believe it uses the pop3 server but i want to switch to imap4 how do i do that with comcast? and i use outlook so after that i need to change the outlook settings. can you explain to me how to do that too.

Is there a place on the Time Warner web email that I can tell them how long I want my emails to stay on their server or do they delete them whenever they want too?

I'm not sure if I am saying this right, but I am wanting to change my email address on yahoo or google, so instead of it saying @gmail.com or Yahoo.com it says my own custom words that I want. Like my business. Can anyone point me in the right direction...