I use firefox and I need to set up my email server. Where do I locate the function. Is it under tools? ?

I cannot find where you go to set up the incoming outgoing email server. Is it under tools? I tried setting it up when it came up automatically but I did it wrong and now I cannot figure out how to locate it.

I use firefox and I need to set up my email server. Where do I locate the function. Is it under tools? ?
FIrefox is a browser, not an email application. You need Thunderbird (it's by the same people that gave you FIrefox.)