digital ocean expert required - urgent

i am using digital ocean server, and yesterday its suddenly crashed the scripts installed on it, and disabled mail functions, no email was working. i did restore to week before, and it was fine, but today again before few hours the same thing happened again. i need an expert to get it fixed quicker also install a email spam filter so we won't get any unauthenticated emails, like spams. this needs to be done quicker