Mozilla & Firefox

[JERRY WHITMIRE]

Hi
I am needing some help with a problem with Mozilla AND  Mozilla,Firefox
this morning i went to check my Netscape email with Mozilla & Firefox and it
says i need to type in a valid email address so i type in 
jerryw4386 at netscape.net
and it will not except it.
I had to put in an old hard drive with Win Xp. just to check my Netscape 
email .
Can i get some help with this PLEASE? I am using FC4 test newest version.
Oh yea Netscape 7.2 will not setup on FC4 test !

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