Hello! When I go to open up to write a new message in my Thunderbird for my Yahoo email account, it comes up with a mixture of letters, words, numbers, etc in the body of the email that goes from the top of the body to the bottom of that. Below is only a small sampling of what comes up before I start typing in the email body-can you help me with this?:

{\rtf1\adeflang1025\ansi\ansicpg1252\uc1\adeff0\deff0\stshfdbch0\stshfloch31506\stshfhich31506\stshfbi31506\deflang1033\deflangfe1033\themelang1033\themelangfe0\themelangcs0{\fonttbl{\f0\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\f34\fbidi \froman\fcharset0\fprq2{\*\panose 02040503050406030204}Cambria Math;} {\f37\fbidi \fswiss\fcharset0\fprq2{\*\panose 020f0502020204030204}Calibri;}{\f38\fbidi \fswiss\fcharset0\fprq2{\*\panose 020b0604030504040204}Tahoma;}{\f39\fbidi \fscript\fcharset0\fprq2{\*\panose 00000000000000000000}Script MT Bold;} {\flomajor\f31500\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\fdbmajor\f31501\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;} {\fhimajor\f31502\fbidi \froman\fcharset0\fprq2{\*\panose 02040503050406030204}Cambria;}{\fbimajor\f31503\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;} {\flominor\f31504\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\fdbminor\f31505\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;} {\fhiminor\f31506\fbidi \fswiss\fcharset0\fprq2{\*\panose 020f0502020204030204}Calibri;}{\fbiminor\f31507\fbidi \froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\f40\fbidi \froman\fcharset238\fprq2 Times New Roman CE;} {\f41\fbidi \froman\fcharset204\fprq2 Times New Roman Cyr;}{\f43\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;}{\f44\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;}{\f45\fbidi \froman\fcharset177\fprq2 Times New Roman (Hebrew);} {\f46\fbidi \froman\fcharset178\fprq2 Times New Roman (Arabic);}{\f47\fbidi \froman\fcharset186\fprq2 Times New Roman Baltic;}{\f48\fbidi \froman\fcharset163\fprq2 Times New Roman (Vietnamese);}{\f380\fbidi \froman\fcharset238\fprq2 Cambria Math CE;} {\f381\fbidi \froman\fcharset204\fprq2 Cambria Math Cyr;}{\f383\fbidi \froman\fcharset161\fprq2 Cambria Math Greek;}{\f384\fbidi \froman\fcharset162\fprq2 Cambria Math Tur;}{\f387\fbidi \froman\fcharset186\fprq2 Cambria Math Baltic;} {\f388\fbidi \froman\fcharset163\fprq2 Cambria Math (Vietnamese);}{\f410\fbidi \fswiss\fcharset238\fprq2 Calibri CE;}{\f411\fbidi \fswiss\fcharset204\fprq2 Calibri Cyr;}{\f413\fbidi \fswiss\fcharset161\fprq2 Calibri Greek;} {\f414\fbidi \fswiss\fcharset162\fprq2 Calibri Tur;}{\f417\fbidi \fswiss\fcharset186\fprq2 Calibri Baltic;}{\f418\fbidi \fswiss\fcharset163\fprq2 Calibri (Vietnamese);}{\f420\fbidi \fswiss\fcharset238\fprq2 Tahoma CE;} {\f421\fbidi \fswiss\fcharset204\fprq2 Tahoma Cyr;}{\f423\fbidi \fswiss\fcharset161\fprq2 Tahoma Greek;}{\f424\fbidi \fswiss\fcharset162\fprq2 Tahoma Tur;}{\f425\fbidi \fswiss\fcharset177\fprq2 Tahoma (Hebrew);} {\f426\fbidi \fswiss\fcharset178\fprq2 Tahoma (Arabic);}{\f427\fbidi \fswiss\fcharset186\fprq2 Tahoma Baltic;}{\f428\fbidi \fswiss\fcharset163\fprq2 Tahoma (Vietnamese);}{\f429\fbidi \fswiss\fcharset222\fprq2 Tahoma (Thai);} {\flomajor\f31508\fbidi \froman\fcharset238\fprq2 Times New Roman CE;}{\flomajor\f31509\fbidi \froman\fcharset204\fprq2 Times New Roman Cyr;}{\flomajor\f31511\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;} {\flomajor\f31512\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;}{\flomajor\f31513\fbidi \froman\fcharset177\fprq2 Times New Roman (Hebrew);}{\flomajor\f31514\fbidi \froman\fcharset178\fprq2 Times New Roman (Arabic);} {\flomajor\f31515\fbidi \froman\fcharset186\fprq2 Times New Roman Baltic;}{\flomajor\f31516\fbidi \froman\fcharset163\fprq2 Times New Roman (Vietnamese);}{\fdbmajor\f31518\fbidi \froman\fcharset238\fprq2 Times New Roman CE;} {\fdbmajor\f31519\fbidi \froman\fcharset204\fprq2 Times New Roman Cyr;}{\fdbmajor\f31521\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;}{\fdbmajor\f31522\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;} {\fdbmajor\f31523\fbidi \froman\fcharset177\fprq2 Times New Roman (Hebrew);}{\fdbmajor\f31524\fbidi \froman\fcharset178\fprq2 Times New Roman (Arabic);}{\fdbmajor\f31525\fbidi \froman\fcharset186\fprq2 Times New Roman Baltic;} {\fdbmajor\f31526\fbidi \froman\fcharset163\fprq2 Times New Roman (Vietnamese);}{\fhimajor\f31528\fbidi \froman\fcharset238\fprq2 Cambria CE;}{\fhimajor\f31529\fbidi \froman\fcharset204\fprq2 Cambria Cyr;} {\fhimajor\f31531\fbidi \froman\fcharset161\fprq2 Cambria Greek;}{\fhimajor\f31532\fbidi \froman\fcharset162\fprq2 Cambria Tur;}{\fhimajor\f31535\fbidi \froman\fcharset186\fprq2 Cambria Baltic;} {\fhimajor\f31536\fbidi \froman\fcharset163\fprq2 Cambria (Vietnamese);}{\fbimajor\f31538\fbidi \froman\fcharset238\fprq2 Times New Roman CE;}{\fbimajor\f31539\fbidi \froman\fcharset204\fprq2 Times New Roman Cyr;} {\fbimajor\f31541\fbidi \froman\fcharset161\fprq2 Times New Roman Greek;}{\fbimajor\f31542\fbidi \froman\fcharset162\fprq2 Times New Roman Tur;}{\fbimajor\f31543\fbidi \froman\fcharset177\fp