if ((grep{/Message\ Sent\ Successfully/} <FILE>) || (grep{/Your\ message\ has\ been\ sent/} <FILE>)){
close FILE;
open(F, '>>:utf8', 'sentchecktest.txt');
print F "sent\n";
close F;
}
else{
close FILE;
open(F, '>>:utf8', 'sentchecktest.txt');
print F "error\n";
close F;
}