index_format + folder-hook + script

if [ "$COLUMNS" -a $COLUMNS -lt "50" ]; then
echo " 
folder-hook .* 'set index_format=\"%3C
|%-10.10n|%-22.22s%> |%{%b%d}\"'
folder-hook sent_mails 
'set index_format=\"%3C|%-10.10t|%-22.22s%> |%{%b%d}\"'
"
else
echo " 
folder-hook .* 'set index_format=\"%4C %Z %{%b %d %H:%M} [%-25.25n] %2M %s %>.(%4c %3l)\"'
folder-hook sent_mails 'set index_format=\"%4C %Z %{%b %d %H:%M} [%-25.25t] %2M %s %>.(%4c %3l)\"'
"
fi