increase max width in mail header

vim/.vim/astroid.vim

@@ -24,12 +24,12 @@ setlocal omnifunc=QueryCommandComplete
 
 " Functions
 
-" Set tw to 500 if in the first 4 lines, else 500
+" Set tw to 5000 if in the first 4 lines, else 72
 au CursorMovedI * call ModifyTextWidth() " execute when cursor has moved, use for all files
 function! ModifyTextWidth()
     let line=getline('.')  " get the current line number of the cursor
     if line('.') < 5  " if line number smaller than 5
-        setlocal textwidth=500   " use high tw setting
+        setlocal textwidth=5000   " use high tw setting
     else
         setlocal textwidth=72 " Otherwise use normal textwidth
     endif